Source of a foul odor when wool is washed (7)

I believe the answer is:

lanolin

(Other definitions for lanolin that I've seen before include "Fatty coating on wool" , "Oil on sheep's wool" , "Wool fat used in ointments" , "something on the Fleece" , "Substance found on sheep's wool" .)

I've seen this clue in The New York Times.

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