Bandage a man after sharp blow (6)
I believe the answer is:
swathe
'bandage' is the definition.
(I know that swathe is a type of bandage)
'a man after sharp blow' is the wordplay.
'a man' becomes 'he' (he refers to a man).
'after' says to put letters next to each other.
'sharp blow' becomes 'swat' (I've seen this in another clue).
'he' put after 'swat' is 'SWATHE'.
(Other definitions for swathe that I've seen before include "Wrap in layers of warm garments or bandages" , "Broad strip (land)" , "Wrap; a cut strip" , "row after reaping" , "Row or path, of grass perhaps, when it is mown" .)