Lurid (6)
I believe the answer is:
garish
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">lurid</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for garish that I've seen before include "Brashly bright" , "Excessively bright, over-colourful (6)" , "Gaudy, over-decorated" , "Colourful in a vulgar manner" , "Gaudy, showy" .)