Complete
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8 10 13 16 6 5 19 1 17 2 9 14 3 11 15 4 12 18 7
  1. 5a Red dyestuff used in food (not for vegans) (9)
  2. 8a Distribute the cards (4)
  3. 9a Proof (8)
  4. 10a When they're 18, it's time to take off! (6)
  5. 11a Entertaining company (6)
  6. 13a Smoked fish (one that's asleep?) (6)
  7. 15a Fine cotton fabric, often used to strain food (6)
  8. 16a British Virgin Islands, say (3,5)
  9. 18a In another direction (4)
  10. 19a At three-month intervals (9)
  11. 1d Paper size (8)
  12. 2d Destroys documents (6)
  13. 3d Take a firm stand (6)
  14. 4d Uncovered (4)
  15. 6d Requiring specialist knowledge to be understood (9)
  16. 7d Not persuaded (9)
  17. 12d You need to get over this to get on (8)
  18. 14d Return to a previous state (6)
  19. 15d Source of stable food? (6)
  20. 17d Move (something) with effort (4)