Power, force (5)
I believe the answer is:
might
<span class="explanation-format__ClueExplanation">I believe this clue is a double definition.<br/ ><br/ >'<span class="explanation-format__original">power</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(I know that power can be written as might)</span><br/ ><br/ >'<span class="explanation-format__original">force</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(might can mean power or force)</span><br/ ><br/ ></span>
(Other definitions for might that I've seen before include "It expresses possibility" , "What functions as an auxiliary" , "Force; could" , "Clout" , "Capability" .)