Complete
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1 8 10 13 16 20 22 2 3 9 19 17 4 15 14 5 12 11 6 21 7 18
  1. 1a 1959 film with Monroe, Lemmon and Curtis (4,4,2,3)
  2. 8a Neither (3)
  3. 9a It is chewed and blown (9)
  4. 10a Pastry top (3,5)
  5. 11a A segment of DNA (4)
  6. 13a Metal outfit? (6)
  7. 14a Lancashire stew (6)
  8. 16a Maize (4)
  9. 17a Science of land management and crop production (8)
  10. 20a One who spells out the details — epic fires (anag) (9)
  11. 21a Writing fluid (3)
  12. 22a Casino turner? (8,5)
  13. 1d Dawn (in America) (5)
  14. 2d Bip the Clown's creator, d. 2007 — ace rum caramel (anag) (6,7)
  15. 3d The 'golden rain' tree (8)
  16. 4d Nonsense (6)
  17. 5d Unoccupied (4)
  18. 6d TNT, say? (4,9)
  19. 7d The Shakespeare drama (7)
  20. 12d Day that seemingly never comes? (8)
  21. 13d One who charges! (7)
  22. 15d Conceited and selfish person (6)
  23. 18d Country bumpkin (5)
  24. 19d Horrendous (4)