Across:
3. Turn into insect? Half-funny story in this! (6)
6,22. Warrior, 25, helping defeat 11's unit, still arranged around style of Britain (7 4)
8. I'm controlled by monarch in this unit (8)
9. American revolutionary with Japanese money... now enmity starts! (8)
10. Escaped by tripping on a rut? (6)
11. He's known for his 12 stand with client, rejecting traditional mantra (6)
12. It helps to shape leather using ground salt (4)
14. Japan is sanctuary protecting auto maker (6)
17. A one-for-one swap for 13? (3)
18. Vampire perhaps let loose to fight (6)
22. see 6 across
24. Moving on, must provide 27s (6)
25. Americans in American city bouncing back "Fine, thank you!" (6)
28. Carefully woo Turks as part of conditioning regime (8)
29. It may be visible from the hills or in canal country (8)
30. Later edition turned Seussier after introduction dropped (7)
31. Mickey perhaps eating second dessert (6)
Down:
1. Posts letters at sea, by pigeons ultimately (5)
:2. 6:50, and sun coming up around Italian capital city (7)
3. see 23
4. Firm convened for visitor from afar (5)
5. Losing every third of 24, and a part of America (7)
6. Shame to be organised around 11's initial template (6)
:7. Fight for resources of the Black Hills with frantic wire: tax our gas! (5 5 3)
12. Canine research centre (3)
13. Craft using thread to make image on leather? (3)
15. Usually discrete vehicle caught in ambush while turning (3)
16. None of the airliners coming back (3)
19. Americans with a music genre with a disrespectful term for a woman (7)
20. Come out from possession of white man at end (7)
21. Begin to hoard lithium, so things can be visible at night (7)
23,3dn. Action in 7, lively 18, brave fight as sworn with a few bunches of fives thrown! (6 3 4)
26. Those sleeping rough avoid hard things with double reeds (5)
27. Crazy one led 25 as wild one got to shore (5)
Solution:
===S=V===BECOME|
=SITTING=I=O=O=|
=C=A=L=REGIMENT|
CHEYENNE=H=E=T=|
=E=S=I=A=OUTRAN|
=M==CUSTER===N=|
LAST=S=S=NISSAN|
A==A==TIT==U==I|
BATTLE=O=S=BULL|
=R===MOUNTS==I=|
LAKOTA=X=A=H=T=|
=P=B=N=WORKOUTS|
PANORAMA=L=R=L=|
=H=E=T=REISSUE=|
MOUSSE===T=E===|
Name: 908 - Tax The Gas!
Author: by BenDR

Annos-Across:
3. COM(edy) in BEE
6,22. GB in *( UNIT STILL )
8. IM in REGENT
9. CHE + YEN + N(ow) E(nmity)
10. *( ON A RUT )
11. CUST(om)ER
12. *SALT
14. tel (Japa)N IS SAN(ctuary)
17. T(a->I)T &lit
18. BAT + *LET
24. *( ON MUST )
25. LA + r(OK) + TA
28. *( WOO TURKS )
29. OR in PANAMA
30. rev ( (s)EUSSIER )
31. S in MOUSE
Annos-Down:
1. tails - (letter)S (a)T (se)A (b)Y (pigeon)S
:2. VI L + ( I in rev( SUN ) )
4. CO MET
5. MO(u)NT(s) AN(d) A
6. C(uster) in *SHAME
:7. *( WIRE TAX OUR GAS )
12. dd
13. dd
15. rev tel (am)BUS(h) <
16. rev tel (air)LIN(ers) <
19. A RAP A HO
20. tel (whit)E MAN AT E(nd)
21. LI in START
23,3dn. groups of five letters removed from "LI(vely  ba)TTLE B(rave  f)IGH(t as sw)ORN"
26. (h)OBOES
27. *HORSE = SHORE
Defs-Across:
3. Turn into
6,22. Warrior, 25, helping defeat 11
8. unit
9. American
10. Escaped
11. He's known for his 12 stand
12. It helps to shape leather
14. auto maker
17. A one-for-one swap for 13? (3)
18. fight
24. 27s
25. Americans
28. part of conditioning regime
29. It may be visible from the hills
30. Later edition
31. dessert
Defs-Down:
1. Posts
:2. city
4. visitor from afar
5. part of America
6. template
:7. Fight for resources of the Black Hills
12. Canine
12. research centre
13. Craft using thread
13. to make image on leather?
15. Usually discrete vehicle
16. None
19. Americans
20. Come out
21. so things can be visible at night
23,3dn. Action in 7
26. things with double reeds
27. Crazy one led 25