Across:
1. Turned up before opening of breakfast bar (3)
3. Philosophy favouring 16, or terrible scam bringing Depression (the greatest)? (10)
9. It could be "Let It Be" or "Let It Go" or "Let It Loose" (5)
10. Beer number ten and previous monarch could be a great one! (9)
11. Last of battalion remains, with struggle to hold lines in country's main city (9)
12. Some provide nutrients, in turn brought into resonance (5)
13. This name might ring one - his invention often did! (4)
14. "The Help", heart-melting production, one which 10 20 13 got 1 down for on 10/3/1876 (9)
17. A "yes" from Russia, and mainstream media is to help sources such as 5 15 author (4 5)
19. Direct from start to silly finish (4)
21. Sleepy Australian, finally back to Australia, will siesta (5)
23. Reversed deterioration with food being processed a second time, with no carbon, iron or copper typically (9)
25. 19s using poles mimicking lead in characteristics (9)
26. Basically, box outside offering 14 across handset? (5)
27. Getting stabbed with dagger unexpectedly, spilled claret, becoming messy (10)
28. Uncle with origins in soliciting American minors? (3)
Down:
1. Obvious place for sound gear at outdoor gig? (6)
2. In place of bathing, she starts to bathe, and she catches David's eye (9)
3. Herb fixed liver after check (7)
4. Noble to pursue source of principle as something to be treasured (5)
5,15. Rejecting all kings and head of church threw earl, tho factions embraced new textbook for 3 across? (3 6 2 7)
6. Apple moved to imprison troublesome union leaders, and surged (5 2)
7. Travelling Andes in car (5)
8. Gently holds student, terribly scared outside (7)
14. Spotting flighty types starting to take wing, having urge within (9)
15. see 5
16. Major streak running on Nasdaq and NYSE? (7)
18. Second one trying to interpret concentrated less (7)
19. Overlooked Double Bay opening, surrounded by frolicking nudes (7)
20. Author sounding green in 2013 extracts from "Green Eggs And Ham" (6)
22. Inspire with a puzzle (5)
24. Known as a loved feature of Hooters (5)
Solution:
PUB=CAPITALISM=|
A=A=H=E=H=E=E=C|
TITLE=ALEXANDER|
E=H=R=R=W=P=A=A|
NASHVILLE=TUNED|
T=H=I===A=U===L|
=BELL=TELEPHONE|
M=B===W=T===F=S|
ADAMSMITH=SEND=|
R===P=T===N=A=G|
KOALA=CONDUCTOR|
E=M=R=H=A=B=I=A|
TRANSMITS=BOOTH|
S=Z=E=N=A=E=N=A|
=BEDRAGGLED=SAM|
Name: 892 - Laissez-Faire
Author: by BenDR

Annos-Across:
1. rev(UP) + B(reakfast)
3. PIT ALI in *SCAM
9. *(LET IT)
10. ALE + X + AND + ER
11. (battalio)N + ASH + VI( LL )E
12. rev tel (provi)DE NUT(rients)
13. CD
14. *(THE (h)ELP) + ONE
17. A + DA + MSM + I T H
19. S(illy) + END
21. tails acrostic
23. rev( ROT CUD NO C )
25. TRA( NS M )ITS
26. acr &lit
27. *DAGGER in BLED
28. acrostic, ext def
Annos-Down:
1. P.A. TENT
2. BATH + SHE + B A , ext def
3. CH + *LIVER
4. P + EARL
5,15. TH(r)EW EA(r)L, THO F(N)A(c)TIONS
6. TU in *APPLE
7. *ANDES
8. L in *SCARED
14. T(ake) + W( ITCH )ING
16. M + *STREAK
18. S + PARSER
19. BB in *NUDES
20. 2,0,1,3 -letter extracts from GR(een) (eggs) A(nd) HAM
22. A + MAZE
24. tel (know)N AS A L(oved)
Defs-Across:
1. bar
3. Philosophy favouring 16
9. It could be "Let It Be" or "Let It Go"
10. could be a great one
11. country's main city
12. brought into resonance
13. This name might ring one - his invention often did!
14. which 10 20 13 got 1 down for on 10/3/1876
17. 5 15 author
19. Direct
21. Sleepy Australian
23. iron or copper typically
25. 19s
26. Basically, box outside offering 14 across handset?
27. messy
28. Uncle
Defs-Down:
1. Obvious
2. she catches David's eye
3. Herb
4. something to be treasured
5,15. textbook for 3 across?
6. surged
7. car
8. Gently holds
14. Spotting flighty types
16. Nasdaq and NYSE?
18. concentrated less
19. Overlooked
20. Author sounding green
22. Inspire
24. of Hooters