Complete
00:00:00
8 10 13 16 6 5 19 1 17 2 9 14 3 11 15 4 12 18 7
  1. 5a Plausible, but unsound, argument (9)
  2. 8a Soften (4)
  3. 9a Unnecessary adornment (8)
  4. 10a Uncommon occurrence (6)
  5. 11a Polish city on the Baltic Sea (6)
  6. 13a Take in – summary (6)
  7. 15a Rupture (6)
  8. 16a Consequences (8)
  9. 18a 1981 film directed by and starring Warren Beatty (4)
  10. 19a Not fully cooked (9)
  11. 1d Slowcoach (8)
  12. 2d Devious-looking (6)
  13. 3d Making demands (6)
  14. 4d Finish filming (4)
  15. 6d Use of Iran (anag) – base (9)
  16. 7d Black or white tie, for instance (5,4)
  17. 12d Not normal (8)
  18. 14d Change something without permission (6)
  19. 15d Next to (6)
  20. 17d Humbug (4)