Gently calm (6)
I believe the answer is:
soothe
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">gently calm</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 soothe that I've seen before include "Assuage, calm" , "Appease" , "Gently calm" , "Console, pacify" , "Cause to feel better" .)