Jam, strange as it may seem (6)

I believe the answer is:

pickle

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'jam' is the definition.
(I know that jam can be written as pickle)

I don't understand the remainder of the clue.

(Other definitions for pickle that I've seen before include "Chutney, relish, salsa etc" , "Preserved vegetable of informal plight" , "Marinate" , "Lather - relish" , "A preserved vegetable or a fine mess" .)

I've seen this clue in The Globe and Mail.

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