Cutting remarks (5)
'cutting remarks' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for barbs that I've seen before include "Hurtful remarks" , "Thorns or pointed remarks" , "Sedatives" .)
(Other definitions for gibes that I've seen before include "digs" , "Mocks, jeers" .)