Sperm whale secretion (9)
I believe the answer is:
ambergris
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">sperm whale secretion</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(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" .)