Give new energy to (12)
I believe the answer is:
reinvigorate
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">give new energy to</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for reinvigorate that I've seen before include "Again strengthen" , "Give new strength to" , "Give new life to" , "Give fresh energy to" , "Give new energy to (someone)" .)