Crossword Genius

Viscous substance extracted from sheep's wool (7)

Ross

I believe the answer is:

lanolin

(Other definitions for lanolin that I've seen before include "Ointment containing wool fat" , "Wool-fat" , "Fatty substance on wool" , "Substance found on sheep's wool" , "Wool fat used in ointments" .)

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