Want to break boxer's nose with hit, which shows a good fighter (5,4)
I believe the answer is:
black belt
'fighter' is the definition.
(thesaurus)
'want to break boxer's nose with hit which shows a good' is the wordplay.
I cannot really see how this works, but
'want' could be 'lack' (synonyms) and 'lack' is located in the answer.
'hit' could be 'belt' (belting is a kind of hitting) and 'belt' is found within the answer.
A single letter 'b' remains which might be clued in a way I don't understand.
This may be the basis of the clue (or it may be nonsense).
Can you help me to learn more?
(Other definitions for black belt that I've seen before include "It's worn by a Karate expert" , "Martial arts expert" , "Combat ace" , "Proficient martial artist" , "Rank in the martial arts" .)