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 8 speech in a drama (9)
  2. 8a Piece for a lone singer or musician (4)
  3. 9a Swingeing (8)
  4. 10a Factional divide (6)
  5. 11a Empty (of) (6)
  6. 13a Player's token in Monopoly (3,3)
  7. 15a ___ Morning, 1967 song by The Velvet Underground (and Nico) (6)
  8. 16a Always sober (8)
  9. 18a Part played (4)
  10. 19a Explosive stuff (9)
  11. 1d Single stone in the form of an obelisk, say (8)
  12. 2d Quick-firing naval anti-aircraft gun used in both World Wars (3-3)
  13. 3d Taken for a ride (6)
  14. 4d Simon and Garfunkel number, say (4)
  15. 6d Film commentary (5-4)
  16. 7d To hand (9)
  17. 12d Hold sacred (8)
  18. 14d Tasty morsel (6)
  19. 15d Like the sea? (6)
  20. 17d Bit of a wedding cake? (4)