Becoming fit (8)
I believe the answer is:
decorous
I believe this clue is a double definition.
'becoming' is the first definition.
('decorous' can be a synonym of 'becoming')
'fit' is the second definition.
(thesaurus)
(Other definitions for decorous that I've seen before include "Appropriate" , "Fitting" , "Befitting" , "In good taste" , "Proper and well-arranged" .)