Complete
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6 8 10 13 16 19 21 7 1 18 17 2 9 15 14 3 12 20 11 4 5
  1. 1a Cross and quarrelsome (9)
  2. 8a Lightweight crease-resistant synthetic fabric (5)
  3. 9a Emblem of royalty (7)
  4. 10a Woven fabric hung on walls (8)
  5. 11a Bushy hairstyle (4)
  6. 13a Norfolk seaside resort (6)
  7. 14a Chaste (anag) (6)
  8. 16a Rich soil (4)
  9. 17a Introduction (8)
  10. 19a Fabulous creature (7)
  11. 20a Animals found in a particular area (5)
  12. 21a Trip (9)
  13. 1d Done (8)
  14. 2d Preposterous (6)
  15. 3d Genealogist's diagram (4)
  16. 4d Quite unexpectedly (3,2,3,4)
  17. 5d Speed up (4,2,3,3)
  18. 6d The art of gardening (12)
  19. 7d Person with an irrational urge to take things (12)
  20. 12d Liquid fuel (8)
  21. 15d Asian sultanate (6)
  22. 18d Fibre from coconut husks (4)