Pistachio (3)
I believe the answer is:
nut
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">pistachio</span>' is the definition.<br/ ><span class="explanation-format__explanation">(thesaurus)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for nut that I've seen before include "keen admirer" , "Butt" , "Screwing block" , "Almond, for example" , "Large, hard-shelled seed" .)