Complete
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7 9 13 16 5 18 1 10 2 8 15 14 3 12 11 4 17 6
  1. 5a Tall silky-haired dog (6,5)
  2. 7a Male offspring (4)
  3. 8a Praiseworthy (8)
  4. 9a Acquire (7)
  5. 11a Demise (5)
  6. 13a Comical (5)
  7. 14a Pungent condiment (7)
  8. 16a Self-government in local matters (4,4)
  9. 17a Incandescence (4)
  10. 18a More than is needed (11)
  11. 1d Poultry products (4)
  12. 2d Visitors (7)
  13. 3d Raise one's voice (5)
  14. 4d Capital on the Danube (8)
  15. 5d Non-metric system of weights (11)
  16. 6d True oilseed (anag) — harmful (11)
  17. 10d Undisguised disrespect (8)
  18. 12d With little or no sound (7)
  19. 15d Hasten (5)
  20. 17d Proceed (2,2)