Little boy who pinches? (6)

I believe the answer is:

nipper

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'little boy' is the definition.
(I've seen this before)

I can't explain the remainder of the clue.

(Other definitions for nipper that I've seen before include "young one" , "Large claw of a crab" , "guilty of pinching?" , "Little chap" , "Little boy" .)

I've seen this clue in The Irish News.

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