Ned leaves on the dot with canine (5)

I believe the answer is:

tooth

I'm a little stuck... Click here to teach me more about this clue!

'canine' is the definition.
(thesaurus)

I don't understand how the remainder of the clue works.

(Other definitions for tooth that I've seen before include "Gearwheel projection" , "Let it stand" , "Jag on the edge of a saw" , "Projection of a gear wheel" , "Bonelike structure" .)

I've seen this clue in the Irish Times and the Irish Times (Crosaire).

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.