Largest (7)
I believe the answer is:
biggest
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">largest</span>' is the definition.<br/ ><span class="explanation-format__explanation">('big' can be a synonym of 'large')</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for biggest that I've seen before include "Greatest in size" , "Largest" , "Extremely great" , "Superlatively large" .)