Cloudless (5)
I believe the answer is:
clear
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">cloudless</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 clear that I've seen before include "Empty - vault" , "With no jams" , "Easy to see or understand" , "Transparent or cloudless" , "Set free of charges" .)