Dims (7)
I believe the answer is:
darkens
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">dims</span>' is the definition.<br/ ><span class="explanation-format__explanation">('darken' can be a synonym of 'dim')</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for darkens that I've seen before include "becomes gloomy" , "Gets black" .)