It's knitted for a milk producer (6)

I believe the answer is:

jersey

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'milk producer' is the definition.
(Jersey is a type of cow)

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

(Other definitions for jersey that I've seen before include "One over the moon might have been such" , "Woollen garment from Channel Island" , "producer for farming programme?" , "Clothing" , "One of the Channel Islands" .)

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

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