Bandage the fellow after sharp blow (6)
I believe the answer is:
swathe
'bandage' is the definition.
(I know that swathe is a type of bandage)
'the fellow after sharp blow' is the wordplay.
'the fellow' becomes 'he' (pronoun for a man).
'after' means one lot of letters go next to another.
'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 "Bandage completely - band of mown grass" , "row after reaping" , "Broad strip or area; wrap in fabric" , "Row or path, of grass perhaps, when it is mown" , "Wrap; a cut strip" .)