Crossword Genius

Rule check announced (5)

Ross

I believe the answer is:

reign

'rule' is the definition.
(reign is a kind of rule)

'check announced' is the wordplay.
'check' becomes 'rein' (both can mean to control or limit).
'announced' indicates a 'sounds like' (homophone) clue.
'rein' sounds like 'REIGN'.

(Other definitions for reign that I've seen before include "Rule over in Niger" , "Period of the rule of a sovereign" , "Hold sway, rule" , "Period of monarch" , "Period of a monarchy" .)

I've seen this clue in The Telegraph.
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