Each clue defines the full solution to which the letter-count refers. However, the cryptic wordplay leads to the grid entry, after one letter has been omitted each time it appears in the full solution. The omitted letters in clue order reveal a relevant timely phrase which solvers should include with their entry.
Thanks, Iminoz! I found "dentoid" for tooth-shaped, but there is also "odontoid" with a similar meaning. And "straddle" seemed to go well with "sit astride".