Pseudo-aesthetic (4)
I believe the answer is:
arty
'pseudo-aesthetic' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for arty that I've seen before include "Aesthetically pretentious" , "Pretentiously cultural" , "Pretentiously artistic" , "Tray (anag)" , "Having pretensions about paintings, music, etc" .)