Complete
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7 9 16 17 20 22 1 12 13 2 18 3 10 23 8 11 21 4 14 19 5 15 6
  1. 1a Coney (6)
  2. 4a Elegant and fashionable (5)
  3. 7a Hindu festival with lights, celebrating the end of the monsoon (6)
  4. 8a Not divisible by two (6)
  5. 9a Energetic dance — swing music (4)
  6. 10a Plant with large brightly coloured flowers — cub is his (anag) (8)
  7. 12a Consonant formed in Estuary English, making 'butter' sound as 'bu/er' — plot lost tag (anag) (7,4)
  8. 17a Galaxy (5,3)
  9. 19a Holy Father (4)
  10. 20a Mountain peak where Noah's Ark landed (6)
  11. 21a Person who plunders (6)
  12. 22a Attempt to pull a fast one (3-2)
  13. 23a Indifference to life (6)
  14. 1d Barrier consisting of bars (7)
  15. 2d Mexican agricultural labourer in the US — crab roe (anag) (7)
  16. 3d Hibernian meat and veg dish (5,4)
  17. 4d One of the two main branches of orthodox Islam (5)
  18. 5d Without reference to anything else (Latin) (2,5)
  19. 6d Frank and reliable (6)
  20. 11d Ungainly (and painful) dive (5,4)
  21. 13d Song for bedtime (7)
  22. 14d Main support for a tree, growing straight downward from the trunk (7)
  23. 15d Hot (7)
  24. 16d Diacritical mark used in German (ä, ö, ü) (6)
  25. 18d Hanker (5)