More than plump
I believe the answer is:
fat
'more than plump' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for fat that I've seen before include "Cooking grease" , "Excess body weight" , "Greasy substance" , "and 24: Overpaid City type" , "Overweight, stout" .)