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