Complete
00:00:00
7 14 19 1 9 12 21 2 15 3 11 20 10 4 18 16 5 8 13 6 17
  1. 1a Ranting public speaker (3-7)
  2. 7a A little piece at a time (3,2,3)
  3. 8a Circular tent (4)
  4. 9a Sharp taste (4)
  5. 10a Study of the structure of animals (7)
  6. 12a Pale yellow vegetable fat used to make chocolate — true tobacco (anag) (5,6)
  7. 14a Wimp (7)
  8. 16a Prayer ending (4)
  9. 19a Mixture of fat and flour used as basis for sauces (4)
  10. 20a American whose first language is Spanish (8)
  11. 21a Attractive young spouse of an affluent older man (6,4)
  12. 1d Unexpected development (5)
  13. 2d Strain of plague (7)
  14. 3d American vagrant (4)
  15. 4d Disposed to be disloyal (8)
  16. 5d Land of the pharaohs (5)
  17. 6d Shake (6)
  18. 11d Cut of meat (4,4)
  19. 12d Chemical element found in coal (6)
  20. 13d Drums (7)
  21. 15d Pugilistic dog? (5)
  22. 17d Dissonant sound (5)
  23. 18d Observe (4)