Expensively stylish (5)
I believe the answer is:
ritzy
'expensively stylish' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for ritzy that I've seen before include "Luxurious" , "Luxuriously opulent (slang)" , "Luxuriously elegant" , "Richly elegant" , "Ostentatiously stylish" .)