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 Trollope's fictional cathedral city (10)
  2. 7a Scraped area on the skin (8)
  3. 8a Alter (4)
  4. 9a Forked out (4)
  5. 10a French cooking (7)
  6. 12a American-born soprano, hailed as La Divina (5,6)
  7. 14a Traversed (7)
  8. 16a Stringed instrument — Irish emblem (4)
  9. 19a Adhesive (4)
  10. 20a Veracious (8)
  11. 21a From now on (10)
  12. 1d 1940s' jazz style (5)
  13. 2d More prepared (7)
  14. 3d Locks (4)
  15. 4d Remarkable (8)
  16. 5d Sprites (5)
  17. 6d Seventh planet from the sun (6)
  18. 11d Regal — grand (8)
  19. 12d Wall paintings (6)
  20. 13d Tanned hide (7)
  21. 15d Root vegetable (5)
  22. 17d Marsupial feature (5)
  23. 18d Heavy pudding — no good (4)