Multiplied by itself (7)
I believe the answer is:
squared
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">multiplied by itself</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 squared that I've seen before include "as some paper might be?" , "Brought into accord" , "As four is to make 16" , "given power?" , "with considerable increase" .)