Calming or relaxing (6)
I believe the answer is:
easing
I believe this clue is a double definition.
'calming' is the first definition.
(thesaurus)
'relaxing' is the second definition.
(eg relaxing or easing some pressure)
(Other definitions for easing that I've seen before include "giving assistance" , "relaxing" , "Relieving tension" , "falling off?" , "Moderation - relief" .)