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 Breed of tiny dog, originally from Mexico (9)
  2. 8a Sound of heavy object hitting the ground (4)
  3. 9a Singing celebrity (4,4)
  4. 10a Haughty (6)
  5. 11a Use fingertips to excite another (6)
  6. 13a Heavy and unappetising (6)
  7. 15a Home for Franciscans, say (6)
  8. 16a Con (8)
  9. 18a Player ranked according to their ability in a knock-out competition (4)
  10. 19a Safe (9)
  11. 1d Great number (8)
  12. 2d Annoyed (informal) (6)
  13. 3d Adopted symbolic character, animal or object (6)
  14. 4d Bickering (4)
  15. 6d District whose residents are mainly of east Asian origin (9)
  16. 7d Big ask (4,5)
  17. 12d Place selling deep-fried food (4,4)
  18. 14d Like lemons or custard? (6)
  19. 15d Look around for food (6)
  20. 17d Jot down (4)