Cryptic crossword

ACROSS

1. Allow one a way to produce curls in hair (6)

4. A look-out the Women’s Institute turn down (6)

9. Some bird this roc could have been! (7)

10. Giant animal also to be found in Panama (5)

11. Leave the stage to former wife with sex appeal (4)

12. Indistinct picture is almost indecent, right? (4)

13. Like hydrogen, it’s left after a fire (3)

15. Walk with difficulty when Liberal gets one person elected (4)

16. Be at the top of a bean (4)

19. Bath put back in retribution (3)

21. Singular number to have made it after the peacekeepers (4)

22. Surrounded by water, is going to join the French (4)

24. Nothing can replace the 16 of 20 but the weight (5)

25. The sort of petrel to adopt in the confusion (7)

26. The sly sort of pony or dog from the Islands (6)

27. Robber finds piece and goes inside (6)

DOWN

1. Avowals of poet could be about right at Victoria and Euston (13)

2. Second hearing I later get right, perhaps (7)

3. The flag one gets schoolmaster to turn up (4)

5. Gave one knowledge of one when a thousand came away (8)

6. A lady abroad, and no mistake (5)

7. Met bulletin her pater wrote about (7,6)

8. She will shortly lose apostrophe if it explodes (5)

14. Cheeky way to put denim in disarray (8)

17. Break up gang as Sid turns up with the players (7)

18. Beatnik’s successor takes a joint to pay a loss (5)

20. NB: cue can be used with profit (5)

23. Peruvian native involved in certain cases (4)