Jam jar (6)

I believe the answer is:

scrape

I believe this is a double definition.

'jam' is the first definition.
(thesaurus)

'jar' is the second definition.
(thesaurus)

(Other definitions for scrape that I've seen before include "pickle!" , "Difficult predicament" , "hole" , "Recaps about abrasion" , "Clear or smooth by grating" .)

I've seen this clue in The Telegraph.

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