Become overdone (4)
I believe the answer is:
cloy
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">become overdone</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for cloy that I've seen before include "Make weary through being overly sweet" , "Be sickeningly sweet" , "Satiate to the point of disgust" , "Be sickly sweet" , "Weary with excess" .)