Administration (10)
'administration' is the definition.
(management is a kind of administration)
This is the entire clue.
(Other definitions for management that I've seen before include "Organisation's leaders" , "Organisation's runners" , "Person employed to improve organisational efficiency" , "skilful treatment" , "Top part of organisation" .)
(Other definitions for government that I've seen before include "Ventnor gem (anag.)" , "Body of rulers" , "A country's rulers" .)