Catch punch (4)
I believe the answer is:
hook
This clue is a double definition.
'catch' is the first definition.
(I know that hook is a type of catch)
'punch' is the second definition.
(type of punch in boxing)
(Other definitions for hook that I've seen before include "Boxer's punch" , "Prostitute" , "Bent piece of metal for catching" , "stroke at Lord's?" , "leader of pirates" .)