Stuck (together) (5)
I believe the answer is:
glued
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">stuck together</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for glued that I've seen before include "Stuck one thing to another" , "Stuck together" , "Gummed" .)