Show resentment? Not a bit! (6)

I believe the answer is:

bridle

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'show resentment?' is the definition.
(I've seen this before)

I can't explain the remainder of the clue.

(Other definitions for bridle that I've seen before include "a bit? That's part of it" , "Part of horse's headgear" , "A curb; show scorn (at)" , "Become indignant" , "Horse restraint" .)

I've seen this clue in The Globe and Mail and The Sun.

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