Smooth, sophisticated (5)
I believe the answer is:
suave
I believe this is a double definition.
'smooth' is the first definition.
(I know that smooth can be written as suave)
'sophisticated' is the second definition.
(I've seen this in another clue)
(Other definitions for suave that I've seen before include "Charming, elegant" , "Smooth-mannered and sophisticated" , "Debonair" , "Urbane and sophisticated" , "Charming and sophisticated though insincere" .)