Flexible, agile (5)
I believe the answer is:
lithe
<span class="explanation-format__ClueExplanation">I believe this clue is a double definition.<br/ ><br/ >'<span class="explanation-format__original">flexible</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >'<span class="explanation-format__original">agile</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ ></span>
(Other definitions for lithe that I've seen before include "Slender, supple" , "able to move supply" , "Slim, graceful" , "Supple and limber" , "Elastic" .)