Pinch a bit (7)
I believe the answer is:
snaffle
This clue is a double definition.
'pinch' is the first definition.
(I've seen this before)
'a bit' is the second definition.
(type of bit used in horseriding)
(Other definitions for snaffle that I've seen before include "A bit; to grab for oneself" , "Illicitly take" , "bit for the horse" , "Pinch" , "A bit; filch" .)