Muscular (6)
'muscular' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for sinewy that I've seen before include "Muscular" , "Muscly; fibrous" , "Freshwater fish" , "strong" , "Tough, fibrous" .)
'muscular' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for built that I've seen before include "Erected" , "Constructed" , "put together" , "Raised" , "Made by combining materials and parts" .)
'muscular' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for beefy that I've seen before include "Brawny" , "Athletic and muscular (non-vegetarian?)" , "Burly" , "Muscular, robust" , "Colloquially muscular" .)
'muscular' is the definition.
(thesaurus)
This is all the clue.
(Other definitions for burly that I've seen before include "Strong and heavy in build" , "Big and sturdy" , "Muscular and heavily built" , "Sturdily built" , "Muscular; strapping" .)
'muscular' is the definition.
(toned can mean having well-defined muscles)
This is all the clue.
(Other definitions for toned that I've seen before include "In good condition (of muscles or skin)" , "Braced" , "Noted (anag.)" , "pitched just right" , "went well" .)
'muscular' is the definition.
(synonyms)
This is all the clue.
(Other definitions for hefty that I've seen before include "Big and strong" , "Brawny" , "Burly" , "Muscular" , "Sizeable" .)