Rule breaking, i.e. rebelliously holds back (5)
I believe the answer is:
reign
'rule' is the definition.
(I know that reign is a type of rule)
'breaking i e rebelliously holds back' is the wordplay.
'holds' says the answer is hidden in the clue.
'back' says the letters should be written backwards.
'ngier' is hidden in the letters of 'breaking i e rebelliously'.
'ngier' in reverse letter order is 'REIGN'.
(Other definitions for reign that I've seen before include "Period of a monarchy" , "Period during which someone is dominant" , "Period of the rule of a sovereign" , "Rule over in Niger" , "Hegemony" .)