Not let go to waste (3)
I believe the answer is:
use
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">not let go to waste</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for use that I've seen before include "Operate" , "Employ - advantage" , "Put to a particular purpose" , "Employ - custom" , "Sue for employment" .)