Period of rule (5)
'period of rule' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for reign that I've seen before include "Monarch's period" , "Monarch's rule" , "Hold sway, rule" , "Predominance" , "Time on throne" .)
'period of rule' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for regime that I've seen before include "Emigre (anag.)" , "Form of rule" , "Dominion of emigre" , "Authoritarian system" , "Method or system of government" .)