Cut with a blow (4)
I believe the answer is:
clip
I believe this clue is a double definition.
'cut' is the first definition.
(clip is a kind of cut)
'a blow' is the second definition.
(clip is a kind of blow)
'with' acts as a link.
(Other definitions for clip that I've seen before include "Short film extract; fasten" , "Something that holds things together - cut" , "Film extract; rapid pace" , "Cartridge container and piece of film" , "rate" .)