Complete
00:00:00
7 9 13 16 5 18 1 10 2 8 15 14 3 12 11 4 17 6
  1. 5 a Unpleasant clash (11)
  2. 7 a Air pollution common in big cities (4)
  3. 8 a Post holder (8)
  4. 9 a MC on stage and screen (7)
  5. 11 a Bishop's hat (5)
  6. 13 a Confused (by life afloat?) (2,3)
  7. 14 a Term of endearment (3,4)
  8. 16 a Small stirrer — not Aesop! (anag) (8)
  9. 17 a Make a reservation (4)
  10. 18 a Nicest peers (anag) — tenacious behaviour (11)
  11. 1 d Hitch (4)
  12. 2 d Outstanding amount to pay (7)
  13. 3 d Where to write notes, musically (5)
  14. 4 d Water-based paint (8)
  15. 5 d What's left to rot in a garden (7,4)
  16. 6 d Put one image over another (11)
  17. 10 d (Exert) force (8)
  18. 12 d A paltry sum of money (informal) (7)
  19. 15 d It's uplifting (5)
  20. 17 d Like a skeleton (4)

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