Complete
00:00:00
7 9 13 16 5 18 1 10 2 8 15 14 3 12 11 4 17 6
  1. 5a Get a grip! (4,3,2,2)
  2. 7a Large urban area (4)
  3. 8a Combine liquids into a smooth mixture (8)
  4. 9a Hell on earth (where tyres get changed?) (3,4)
  5. 11a Prate (anag) — come to the point? (5)
  6. 13a Salty water (5)
  7. 14a Place to eat in Greece — near a TV (anag) (7)
  8. 16a Not a Brexit supporter? (8)
  9. 17a Propel (4)
  10. 18a Illuminated on stage (11)
  11. 1d Droll (4)
  12. 2d Cornmeal — no petal (anag) (7)
  13. 3d Robust (5)
  14. 4d Where the audience can't see (3-5)
  15. 5d Small fragments of a broken object (11)
  16. 6d Snotty (6-5)
  17. 10d US Department of Defense (8)
  18. 12d Bombardment (7)
  19. 15d An old pawnbroker? (5)
  20. 17d A green stroke? (4)