Rule, manage (6)
I believe the answer is:
govern
This clue is a double definition.
'rule' is the first definition.
(I know that rule can be written as govern)
'manage' is the second definition.
(thesaurus)
(Other definitions for govern that I've seen before include "Manage - control" , "Run" , "Rule with authority, perhaps a country" , "Be in power" , "Control and direct the affairs of" .)