Government; measure (4)
I believe the answer is:
rule
This clue is a double definition.
'government' is the first definition.
(rule can mean government or control)
'measure' is the second definition.
(rule is a kind of measure)
(Other definitions for rule that I've seen before include "Govern through lure" , "Regulation, reign" , "Government - measure" , "Regulation, custom" , "Reign - law" .)