Sophisticated, refined (8)
I believe the answer is:
cultured
This clue is a double definition.
'sophisticated' is the first definition.
(similar in meaning)
'refined' is the second definition.
(similar in meaning)
(Other definitions for cultured that I've seen before include "Refined -- well educated" , "Refined; well-read" , "Refined, well-educated" , "like some pearls" , "Well versed in the arts" .)