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

ACROSS

1. Able to metamorphose as crazy chimp or Pole (11)

9. New York politician, 2001: character of one who will not fully metamorphose (7)

10. Bit of information predating repumped hearts (5)

11. Spartan magistrate losing right to sit on end of board in Jewish vestment (5)

12. Plug ham concoction in celebration of Lewis Carroll (7)

13. Crazed cretins with no right to display deviant conduct ... (6)

15. ... as outside inspiration provides entertainment ... (6)

18. ... about Liam - but never quite finishing words, due to loss of will-power (7)

20. As films were, thanks to roughly dun cuttlefish extract (5)

22. Trim, rotate vertically, and turn inside out (5)

23. Porcelain in dome is sent from Germany (7)

24. Like Rod, I get backfill or manure topping after cutting kale head back (11)

DOWN

2. For some poets, pure water is an omission from 9-Across arrangement (5)

3. Pelts hydrogen into rust (7)

4. What eggheads are into? (6)

5. To ride a bike, you don't need a manual! (5)

6. Embracing Mayan leader is thus forming a thin connection (7)

7. Attempted to impregnate, but lost head of steam for good, and thus repeated (11)

8. Work to ban shape I am - a two-headed monster! (11)

14. Disease to quickly check Spanish celebration, and cut short American cheer (7)

16. Dog's mother unlucky (7)

17. Blame a health reversal on sinister side of person (6)

19. Like Rod, I follow later and trim hyacinth heads (5)

21. If a riddle were so plain, would it be given back? (5)