The initials preceding each clue represent its author, and do not form part of the clue! Scroll down for more information.

Across:
   1,7dn. JdS - She sang of 4 down and played banjo with endless zeal (4 4)
   4. NB - Tree from the Antarctic perhaps shelters a little penguin (6)
  10. SU - A crime, 9 by a country (7)
  11. SZ - Expected more Tunisians to hold back (2 5)
  12. SA - Internalising, 7: "I perform for nothing" (3)
  13. AM - Cash in your chips and depart for Rivera, perhaps (5)
  14. SA - Cure for E habit found here (5)
  15. SU - Daughter acknowledges UPS partner (5)
  16. JdS - An undertaking to tie apron around spare tyre (9)
  18,9dn. SA - Scram! This is 16 26-29 II! (9 8)
  20. see 15 down
  21. STH - Decent grinder changed hands (5)
  23. JdS - Make Orlando glow (5)
  25. RVB - Waver, withraw, leave, feeling poorly (3)
  27. JH - Backwards monster surrounds graduate with blockade (7)
  28. MM - Penned bird sheltering another head to toe (7)
  29. RVB - Cook carries a little cinnamon for sponsor (6)
  30. VRW - Plane flies ... I devour sandwiches! (4)
Down:
   2. TM - Force the outcome and prove disastrously in hock to the king (9)
   3. SU - Reckless Diana’s taking drug with nymphs (7)
   4. RVB - Overheard bit of harmony (5)
   5,24. MG - Prof swears iron used for captives (9 2 3)
   6. NB - A song about origins of quarterstaffs, Uzis, and tanks (7)
   7. see 1 across
   8. STH - Catch part of game show (4)
   9. see 18 across
  15,20ac. TM - 16 26-29 II: I'd take part in crashing Mercedes into bar (8 5)
  16. MM - Nobly mock comical TV series (2 2 5)
  17. JdS - I started, I tainted, I restored (9)
  19. TM - Glasshouses also rebuilt alongside estuary (7)
  20. JH - Ashes of ruined seminar (7)
  22. TM - Takes openers: run out before stumps (4)
  24. see 5
  26. STH - Stroke a cat with iron deficiency (4)

All clues composed by Clue-For-The-Day participants at the Facebook Cryptic Crossword Society page, during the CFTD contest of December 22, 2022.

The initials represent the following setters (FB names):

AM Alec Macaulay
BR Ben Robinson
JdS Joyce de Silva
JH Joel Hess
MG Monty Green
MM Melissa McSeismal
NB Neha Bhandari
RVB Rhiannon Vivian-Bolt
SA Steve Allen
STH Simon T. Hill
SU Saurabh Upadhyay
SZ Suzy Zoom
TM Tony Morris
VRW Victor Rupert Williamson

And here are all the other clues that were submitted in the game:

Across:
1,7dn.	SA - Joe's bonanza? No, son - rebelling Joe Hill's singer (4,4)
4.	SU - Common seedless tree (6)
10.	SU - Crime, a bombing by a country (7)
11.	NB - Routine preparation before birth (2,5)
11.	SA - Ruin toe, unfortunately, before being born (2,5)
11.	SA - Erudition I'd not displayed before delivery (2,5)
12.	NB - Hurry and return pizza lacking zucchinni and artichoke toppings (3)
12.	SU - Rest in peace Romeo! Eliminated by unknown for nothing… (3)
13.	SA - Dragon ran, no? Ran around, i.e. like someone on football pitch (5)
14.	RVB - (nfc): Swimmer drops model back for therapy (5)
15.	SA - Built-up snow drift started on the hills (5)
15.	TM - Chances to move the ball when necklines of dresses are cropped for daring top (5)
15.	RVB - Snowdon's son lost, wandering in the hills (5)
15.	STH - Turf over and around edges of Wimbledon drains (5)
21.	SA - A driver for Ukrainian forces - not English, honest! (5)
21.	BR - Being ethical not the new normal unfortunately (5)
23.	TM - Orlando's flower? (5)
27.	SA - Stop or go on amber? Confusing! (7)
29.	SA - Re: support for the Queen? (6)
30.	RVB - Team regularly swindled (4)
Down:
2.	SA - Concerning prisoner of war, Queen's subject (9)
3.	TM - Spirits with water aid sane reconciliation (7)
4.	SA - Hope a cessation produces calm (5)
5,24	SA - POW, POW, POW ... Fully beaten they were, sometimes (9 2 3)
5,24	AM - Hogan’s Heroes perhaps bent wires for aprons (9 2 3)
6	SU - Question occupying Reverend: Quit dysfunctional car pools? (7)
8	TM - Look into sometimes having to come together (4)
16.	SA - Re: fantastic second-rate hair where I live (2,2,5)
16.	TM - Head position demand from executioner? (2,2,5)
19.	RVB - A sailor at sea in sunrooms (7)
20. 	MM - Refuse the Reverend’s masses of rocks (7)
20. 	MM - The Reverend, being not well-spoken, yells: “Me checks in ashes!” (7)
26-29ac	TM - Second level gambler? (10)

For members of the forum, the game can be accessed here. (SPOILER alert!)