Golfer making comeback receives blow in fight (7)
I believe the answer is:
scuffle
'fight' is the definition.
(scuffle is a kind of fight)
'golfer making comeback receives blow' is the wordplay.
'golfer' becomes 'els' (Ernie Els - former number one professional golfer).
'making comeback' says the letters should be written in reverse.
'receives' is an insertion indicator.
'blow' becomes 'cuff' (I've seen this before**).
'els' reversed gives 'sle'.
'sle' going around 'cuff' is 'SCUFFLE'.
'in' acts as a link.
(Other definitions for scuffle that I've seen before include "Brief, confused fight" , "Disorderly fighting" , "A confused struggle or minor fight" , "Bit of argy-bargy" , "Short confused fight" .)