Quibbles, carps (6)
I believe the answer is:
cavils
I believe this clue is a double definition.
'quibbles' is the first definition.
(I've seen this before)
'carps' is the second definition.
('cavil' can be a synonym of 'carp')
(Other definitions for cavils that I've seen before include "Raises petty objections" , "Makes petty or unnecessary objections" , "Raises trivial objections" , "Quibbles, carps" .)