Artificial gems (5)
I believe the answer is:
paste
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">artificial gems</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 paste that I've seen before include "One way to fix" , "not real rock" , "Adhesive; imitation gem" , "foie gras" , "Fake gems; adhesive" .)