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 Kind of equation (9)
  2. 8a Commotion (3-2)
  3. 9a Pasta cushions with a savoury filling (7)
  4. 10a Slightly salty, with mixture of sea and fresh water (8)
  5. 11a In the same place (abbr) (4)
  6. 13a Termination (6)
  7. 14a Exhibitionist— rose up (anag) (6)
  8. 16a Thrill (4)
  9. 17a Poorly executed (8)
  10. 19a One removed from danger (7)
  11. 20a Leather strip (5)
  12. 21a Lead(er) (9)
  13. 1d Duck talk? (8)
  14. 2d Kind of clue (6)
  15. 3d Talk in a noisy and excited way (4)
  16. 4d Analyse and solve problems (12)
  17. 5d Brilliant young talent (5,7)
  18. 6d Something wonderful (3,4,5)
  19. 7d Be a toady (3,3,6)
  20. 12d Vied (8)
  21. 15d Shirt part (6)
  22. 18d Throaty seductive sound (4)