Physically fit or strong (8)
I believe the answer is:
athletic
<span class="explanation-format__ClueExplanation">This clue is a double definition.<br/ ><br/ >'<span class="explanation-format__original">physically fit</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >'<span class="explanation-format__original">strong</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ ></span>
(Other definitions for athletic that I've seen before include "Sporting, vigorous" , "Vigorously active" , "Wigan, for example" , "Strong and active, good at sports" , "Given to partaking in sporting events" .)