Complete
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7 14 19 1 9 12 21 2 15 3 11 20 10 4 18 16 5 8 13 6 17
  1. 1a Traveller with a rucksack (10)
  2. 7a Small freshwater turtle (8)
  3. 8a Intense — extreme (4)
  4. 9a Arab sailing vessel (4)
  5. 10a Lack of refinement (7)
  6. 12a Car with a folding roof (11)
  7. 14a Magic (7)
  8. 16a Small quantity (of residue?) (4)
  9. 19a Slide out of control (4)
  10. 20a Plausible but false (8)
  11. 21a Reprimand (7-3)
  12. 1d Lolly — basic food (5)
  13. 2d Animated film made by photographing a series of drawings (7)
  14. 3d Chrysalis (4)
  15. 4d Sorry (8)
  16. 5d Finished (5)
  17. 6d A grinder or pounder (6)
  18. 11d Act of retaliation (8)
  19. 12d Criminals (6)
  20. 13d Tortilla folded around a savoury filling (7)
  21. 15d Core group — cared (anag) (5)
  22. 17d Surly — rough-spoken (5)
  23. 18d Thin (4)