Falstaffian, in a way (5)
I believe the answer is:
obese
'falstaffian in a way' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for obese that I've seen before include "likely to tip the balance?" , "with a pot?" , "Morbidly overweight" , "getting well-upholstered" , "Grossly fat" .)