Sate (4)
I believe the answer is:
cloy
'sate' is the definition.
(cloying is a kind of sating)
This is all the clue.
(Other definitions for cloy that I've seen before include "Be disgustingly rich" , "Nauseate" , "Make weary through over-sentimentality" , "Cause distaste by excessive sweetness" , "Weary with excess" .)