Pacify, placate (7)
I believe the answer is:
appease
I believe this clue is a double definition.
'pacify' is the first definition.
(synonyms)
'placate' is the second definition.
(synonyms)
(Other definitions for appease that I've seen before include "Calm, pacify, placate" , "Propitiate by concessions" , "Placate (someone) with concessions" , "Satisfy demands by making concessions" , "Mollify by making concession" .)