Cologne ingredient (4)
I believe the answer is:
musk
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">cologne ingredient</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for musk that I've seen before include "that smells strongly" , "Glandular secretion from a male deer, used in making perfume" , "Scent (for a stag party?)" , "Substance from deer used as basis of perfumes" , "Perfume substance" .)