Treat the new potatoes with jam? (6)

I believe the answer is:

scrape

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'jam?' is the definition.
(both can mean a difficult situation)

I don't understand how the remainder of the clue works.

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(Other definitions for scrape that I've seen before include "Rasp or abrade" , "pickle!" , "Grate; graze" , "Save with difficulty - sounds abrasive" , "Use last remaining resource - . . . . . . the barrel" .)

I've seen this clue in the Evening Standard.

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