Paste (4)
I believe the answer is:
glue
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">paste</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I know that paste can be written as glue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for glue that I've seen before include "agent with sticking power" , "Bond" , "size" , "Gum" , "Adhesive stuff" .)