Pickpocket's chance to get lucky? (3)

I believe the answer is:

dip

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'pickpocket's' is the definition.
(synonyms)

I can't explain the remainder of the clue.

(Other definitions for dip that I've seen before include "Dunk" , "Sink; thick sauce" , "Sink downwards" , "Decline" , "A quick bathe" .)

I've seen this clue in the Evening Standard.

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