Tea's brewed: fill to excess (4)
I believe the answer is:
sate
'fill to excess' is the definition.
(I've seen this in another clue)
'tea's brewed' is the wordplay.
'brewed' is an anagram indicator.
'teas' is an anagram of 'SATE'.
(Other definitions for sate that I've seen before include "Satisfy more than fully" , "spicy meat" , "cloy" , "Supply too much" , "Stuff with teas" .)