Sperm whale secretion, used in perfumes (9)
I believe the answer is:
ambergris
'sperm whale secretion used in perfumes' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for ambergris that I've seen before include "A waxy substance" , "Sperm whale secretion used in perfume manufacture" , "Sperm whale product used in perfumery" , "Wax-like substance" , "Ash-grey, scented substance obtained from whales" .)