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 Live in (6)
  2. 4a Someone standing in temporarily for another of the same profession (5)
  3. 7a Soviet dictator, d. 1953 (6)
  4. 8a Swallowed (6)
  5. 9a Thin layer of gold leaf or paint (4)
  6. 10a Sheriff's officer (8)
  7. 12a Eternal (11)
  8. 17a Unexpected and inconvenient (8)
  9. 19a Loud utterance (4)
  10. 20a Commotion (6)
  11. 21a Courageously (6)
  12. 22a Skating venues (5)
  13. 23a Secure (anag) – deliverance (6)
  14. 1d Not indoors (7)
  15. 2d French novelist, author of Gigi, d. 1954 (7)
  16. 3d Long thin cigar (9)
  17. 4d Roaring cats (5)
  18. 5d Keep the lid on (7)
  19. 6d Fielding position (3-3)
  20. 11d Latin American ballroom dance (4,5)
  21. 13d Riboflavin, for example (7)
  22. 14d Perfectly delightful (7)
  23. 15d Northern region of ancient Israel (7)
  24. 16d Wooer (6)
  25. 18d Somerset cathedral city (5)