Fills (5)
I believe the answer is:
sates
'fills' is the definition.
('sate' can be a synonym of 'fill')
This is all the clue.
(Other definitions for sates that I've seen before include "Stuffs or cloys with excess" , "Fills with food, stuffs" , "Fully satisfies" , "Satisfies -- asset (anag)" , "Fills to satisfaction" .)