Sophisticated, suave (6)
I believe the answer is:
urbane
I believe this is a double definition.
'sophisticated' is the first definition.
(synonyms)
'suave' is the second definition.
(I've seen this in another clue)
(Other definitions for urbane that I've seen before include "Smooth-mannered" , "Suavely elegant" , "Elegant and sophisticated - sounds like city type" , "Cultured" , "Sophisticated and elegant - sounds citified" .)