Very clever move (12)
I believe the answer is:
masterstroke
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">very clever move</span>' is the definition.<br/ ><span class="explanation-format__explanation">(a masterful move)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for masterstroke that I've seen before include "Clever idea" , "Brilliant act" , "outstanding piece of strategy" .)