Quiet, soothing (7)
I believe the answer is:
restful
<span class="explanation-format__ClueExplanation">This clue is a double definition.<br/ ><br/ >'<span class="explanation-format__original">quiet</span>' is the first definition.<br/ ><span class="explanation-format__explanation">(similar in meaning)</span><br/ ><br/ >'<span class="explanation-format__original">soothing</span>' is the second definition.<br/ ><span class="explanation-format__explanation">(synonyms)</span><br/ ><br/ ></span>
(Other definitions for restful that I've seen before include "Still - calming" , "Sedative" , "Calm" , "Relaxing" , "Soothing is required" .)