Crossword Genius

Fracture one's fingers? (4)

Ross

I believe the answer is:

snap

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'fracture' is the definition.
(thesaurus)

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(Other definitions for snap that I've seen before include "Break under strain" , "Break off - card-game" , "Unpremeditated - bite" , "Become unhinged" , "that's a copy!" .)

I've seen this clue in the Evening Standard.
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