Large and plump (6)
I believe the answer is:
rotund
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">large and plump</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 rotund that I've seen before include "'Corpulent, round (6)'" , "Round and plump" , "Portly" , "Rather obese" , "Grandiloquent; podgy" .)