Physically strong and fit (8)
I believe the answer is:
athletic
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">physically strong and fit</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 athletic that I've seen before include "Given to partaking in sporting events" , "Physically fit, strong and active" , "Muscular" , "Good at running and jumping" , "Strong and vigorous" .)