Neb (4)
I believe the answer is:
nose
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">neb</span>' is the definition.<br/ ><span class="explanation-format__explanation">(thesaurus)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for nose that I've seen before include "Conk (slang)" , "It detects by smell" , "Snout" , "Proboscis" , "Nuzzle" .)