Trashy, vulgar (6)
I believe the answer is:
kitsch
I believe this clue is a double definition.
'trashy' is the first definition.
(I've seen this before)
'vulgar' is the second definition.
(I've seen this before)
(Other definitions for kitsch that I've seen before include "Vulgar, sentimental, art" , "Tawdry stuff" , "Articles of dubious taste" , "Lack of good taste in art" , "Vulgarised art" .)