Rotund (5)
I believe the answer is:
plump
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">rotund</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 plump that I've seen before include "Full of figure" , "Chubby, round" , "Slightly fat" , "Pleasantly chubby" , "Rotund" .)