Pacify phone widget with simplicity (7)
I believe the answer is:
appease
'pacify' is the definition.
(synonyms)
'phone widget with simplicity' is the wordplay.
'phone widget with' becomes 'app' (I can't explain this - if you can you should give a lot more credence to this answer).
'simplicity' becomes 'ease' (synonyms).
'app'+'ease'='APPEASE'
Can you help me to learn more?
(Other definitions for appease that I've seen before include "Placate (someone) with concessions" , "To behave like Chamberlain" , "Conciliate" , "Mollify or calm by making concessions" , "Satisfy demands by making concessions" .)