Belly, paunch (3)
I believe the answer is:
gut
<span class="explanation-format__ClueExplanation">I believe this is a double definition.<br/ ><br/ >'<span class="explanation-format__original">belly</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(informal term for the stomach or gut)</span><br/ ><br/ >'<span class="explanation-format__original">paunch</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ ></span>
(Other definitions for gut that I've seen before include "Remove innards from" , "one's bust in strenuous effort" , "good German" , "Evidence of heavy drinking" , "Material for violins" .)