Glaringly vivid (5)
I believe the answer is:
lurid
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">glaringly vivid</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 lurid that I've seen before include "Awfully bright" , "Vividly shocking" , "Ghastly bright" , "Explicit" , "Grim" .)