Be grabbing servant, resulting in bruise (5,3)
I believe the answer is:
black eye
'bruise' is the definition.
(black eye is a kind of bruise)
'be grabbing servant' is the wordplay.
'grabbing' is an insertion indicator.
'servant' becomes 'lackey' (lackey is a kind of servant**).
'be' enclosing 'lackey' is 'BLACK EYE'.
'resulting in' is the link.
(Other definitions for black eye that I've seen before include "Result of facial blow" , "Facial bruising" , "Visible sign of a fight" , "Key cable (anag)" , "result of being punched?" .)