Disappears gradually (5)
I believe the answer is:
fades
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">disappears gradually</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for fades that I've seen before include "Gets less" , "Gets weaker" , "Loses colour, through age or sunlight" , "Loses colour or freshness" .)