Chubby, rounded (5)
I believe the answer is:
plump
I believe this clue is a double definition.
'chubby' is the first definition.
(I know that chubby can be written as plump)
'rounded' is the second definition.
(I've seen this before)
(Other definitions for plump that I've seen before include "Tubby; opt (for)" , "stout" , "Not obese, just pleasantly rounded" , "Chubby, rounded" , "Fat - set down unceremoniously" .)