Bonehead (3)
I believe the answer is:
ass
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">bonehead</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for ass that I've seen before include "Pompous person" , "sap" , "Silly fellow in passionate state" , "Trump's behind" , "Horse-type animal" .)