Extending (10)
I believe the answer is:
stretching
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">extending</span>' is the definition.<br/ ><span class="explanation-format__explanation">(stretching is a kind of extending)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for stretching that I've seen before include "Pulling out" , "Extending" , "Exaggerating" .)