Otic secretion also known as cerumen (6)

I believe the answer is:

earwax

(Other definitions for earwax that I've seen before include "Hearing problem" , "Soft yellow substance secreted by glands of a certain organ" , "Otic secretion" , "Waxy secretion impairing hearing" , "Shell-like secretion" .)

I've seen this clue in The Times.

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