Influence, manage (7)
I believe the answer is:
control
I believe this is a double definition.
'influence' is the first definition.
(thesaurus)
'manage' is the second definition.
(I've seen this in another clue)
(Other definitions for control that I've seen before include "Check" , "Handle, operate" , "Regulation" , "Regulate with self-possession?" , "Manage command post" .)