Fix with something sticky (3)

I believe the answer is:

jam

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'fix' is the definition.
('jam' can be a synonym of 'fix')

I don't understand the remainder of the clue.

(Other definitions for jam that I've seen before include "Sweet stuff for bread - stuff it in" , "problem" , "Conserve" , "Fruit preserve" , "Spread; improvise (jazz)" .)

I've seen this clue in the Evening Standard.

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