Factotum one sort of boxer would have (8)
I believe the answer is:
dogsbody
This clue is a double definition.
'factotum' is the first definition.
(both can mean someone who does lots of jobs)
'one sort of boxer would have' is the second definition.
(boxer is a type of dog)
(Other definitions for dogsbody that I've seen before include "One who has to do all the boring jobs" , "One given menial tasks" , "Put-upon person" , "Menial servant" , "General factotum" .)