Clearly noticeable (6)
I believe the answer is:
marked
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">clearly noticeable</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for marked that I've seen before include "Singled out; clearly noticeable" , "Pronounced" , "Easily noticeable" , "Read, corrected and awarded a grade" , "showing flag maybe" .)