Having well-defined muscles (5)
I believe the answer is:
toned
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">having well-defined muscles</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for toned that I've seen before include "pitched just right" , "Noted (anag.)" , "went well" , "Muscular" , "In good condition (of muscles or skin)" .)