Stout, corpulent (6)
I believe the answer is:
portly
I believe this clue is a double definition.
'stout' is the first definition.
(synonyms)
'corpulent' is the second definition.
(I've seen this before)
(Other definitions for portly that I've seen before include "Somewhat overweight" , "Rather fat" , "Rotund" , "Plump, corpulent" , "Stout and dignified" .)