Cure and wrap the odd deli items that go off like milk (6)

I believe the answer is:

curdle

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'go off like milk' is the definition.
(I've seen this before)

I can't explain the rest of the clue.

(Other definitions for curdle that I've seen before include "Go bad or sour" , "(Of milk) separate out" , "Go sour, milk or blood" , "cause milk problem" , "Make blood do this to fill with horror" .)

I've seen this clue in the Sydney Morning Herald.

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