Less overcast (7)
I believe the answer is:
clearer
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">less overcast</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 clearer that I've seen before include "Bank" , "Less obscured" , "Less obscure" , "Less clouded, more well-defined" , "More plain" .)