Pal I chat up (keeping under wraps old sausage) (9)

I believe the answer is:

chipolata

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'sausage' is the definition.
(I know that chipolata is a type of sausage)

I cannot understand how the rest of the clue works.

(Other definitions for chipolata that I've seen before include "banger" , "Small thin sausage" , "Type of sausage" , "Party snack" .)

I've seen this clue in The Independent.

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