Tawdry art (6)
I believe the answer is:
kitsch
'tawdry art' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for kitsch that I've seen before include "Tawdry stuff" , "Vulgar, pretentious" , "Vulgar, sentimental, art" , "in vulgar fashion" , "Lack of good taste in art" .)