Trashy, vulgar (6)
I believe the answer is:
kitsch
<span class="explanation-format__ClueExplanation">I believe this clue is a double definition.<br/ ><br/ >'<span class="explanation-format__original">trashy</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >'<span class="explanation-format__original">vulgar</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ ></span>
(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" .)