Relaxed, unofficial (8)
I believe the answer is:
informal
<span class="explanation-format__ClueExplanation">This clue is a double definition.<br/ ><br/ >'<span class="explanation-format__original">relaxed</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(informal can mean relaxed or casual)</span><br/ ><br/ >'<span class="explanation-format__original">unofficial</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(similar in meaning)</span><br/ ><br/ ></span>
(Other definitions for informal that I've seen before include "Casual and unceremonious" , "Casual, not official" , "Casual, free and easy" , "Cosy -- loose" , "If normal, be casual and without ceremony" .)