1.  2.  3.  4.   g 5. 6.  7.  8.
  g   g   g   g g g   g   g  
9.         g 10.      
  g   g   g   g g g   g   g  
11.      g 12.  13.       
  g   g g g   g   g   g   g  
14.    15.          g g
  g g g   g   g   g   g g g 16.
g g 17.          18.   
19. g   g   g   g   g g g   g  
20.          g 21.     
  g   g   g g g   g   g   g  
22.       g 23.        
  g   g   g g g   g   g   g  
24.       g 25.        

NOTE for non-Australian solvers

Redgum and Chain are Australian bands. Captain Blood was either a Tasmanian-born film star or a Victorian footballer. Any of which may or may not be helpful.

ACROSS

1. Endless finery in spoils of sailors (8)

5. Rendered unconfident without heroic leader, and humiliated (6)

9. Sport's car loses out (8)

10. Facing stone extraction from rash largesse (6)

11. Retin poorly with K compound (5)

12. Deployed as a prosthesis, roughly timed around plan (9)

14. Tutus in mud - oil ruined so many (13)

17. My role in life is about specifically (at heart) making things harder to understand (13)

20. To climb ... the most eternal? (2. 7)

21. A beast like Captain Blood (5)

22. Two states united, coming back at adequate promotion (6)

23. Get involved - mix, train, etc. (8)

24. Incomplete, then tired and complete (6)

25. It was then I chose to give up being skinny (8)

DOWN

1. Man - a mole turned nasty! (8)

2. One appears in anal performance (7)

3. One so poor it kills? (5)

4. Fidgety about little bird with ugly head offered in compensation (11)

6. Latin rhythm-master battery goes about one short month (5,4)

7. Shows respect with musical instrument in commando unit (7)

8. Slander, ideally cut down (6)

13. Strangely split, he is in the Barbarians (11)

15. Official prices not flexible (9)

16. Quote ancient letter in reverse, experiencing loss of control (8)

17. Just an animal, you say? (7)

18. Teach like starch perhaps (7)

19. Mark of Redgum's arrangement: right not represented (6)

21. Chain - driving parts provided by inate ethics (5)