Having well-defined and firm muscles (5)
I believe the answer is:
toned
(Other definitions for toned that I've seen before include "Having firm and well-developed muscles" , "Braced" , "Noted (anag.)" , "pitched just right" , "went well" .)
I believe the answer is:
toned
(Other definitions for toned that I've seen before include "Having firm and well-developed muscles" , "Braced" , "Noted (anag.)" , "pitched just right" , "went well" .)