Overly precious (4)
I believe the answer is:
twee
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">overly precious</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for twee that I've seen before include "Excessively sentimental" , "Affectedly dainty or quaint" , "Affectedly sweet" , "Pretty-pretty" , "Overly cute" .)