Bright, cloudless (5)
I believe the answer is:
sunny
<span class="explanation-format__ClueExplanation">I believe this is a double definition.<br/ ><br/ >'<span class="explanation-format__original">bright</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(similar in meaning)</span><br/ ><br/ >'<span class="explanation-format__original">cloudless</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(similar in meaning)</span><br/ ><br/ ></span>
(Other definitions for sunny that I've seen before include "Cheerful - cloudless" , "Genial, cheerful" , "Bright and cheerful" , "(Of a person's disposition) always positive" , "cheerful sound" .)