Barbed remark (4)
I believe the answer is:
gibe
'barbed remark' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for gibe that I've seen before include "Jeer, barb" , "A jeering remark" , "Hurtful remark" , "Dig, or a barbed comment" , "Barb, dig" .)