Kidney-shaped nut (6)

I believe the answer is:
cashew
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">kidney-shaped nut</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 cashew that I've seen before include "Edible nut" , "Acajou" , "snack perhaps" , "Chew as you would this nut" , "nut-tree" .)