Groom with fine teeth initially averse to fighting (6)
I believe the answer is:
combat
'fighting' is the definition.
(synonyms)
'groom with fine teeth initially averse' is the wordplay.
I cannot quite see how this works, but
'groom' could be 'comb' (combing is a way of grooming oneself) and 'comb' is located in the answer.
The remaining letters 'at' is a valid word which might be clued in a way I don't see.
This may be the basis of the clue (or it may be nonsense).
'to' acts as a link.
Can you help me to learn more?
(Other definitions for combat that I've seen before include "Fight, struggle or contest" , "Conflict" , "A fight or contest, sometimes mortal" , "Military action" , "Battle or fight" .)
