Cerumen (6)
I believe the answer is:
earwax
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">cerumen</span>' is the definition.<br/ ><span class="explanation-format__explanation">(synonyms)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for earwax that I've seen before include "Shell-like secretion" , "Waxy secretion impairing hearing" , "Soft yellow secretion - cerumen" , "Soft yellow substance secreted by glands of a certain organ" , "Otic secretion" .)