Broke off the conversation? (7)

I believe the answer is:

snapped

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'broke' is the definition.
(snapping is a kind of breaking)

I can't explain the remainder of the clue.

(Other definitions for snapped that I've seen before include "What paparazzi did" , "Broke suddenly" , "lost temper" , "Broke with a crack" , "Broke sharply" .)

I've seen this clue in the Evening Standard.

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