Moral belief within Elizabeth I consistently (5)
I believe the answer is:
ethic
'moral belief' is the definition.
'within elizabeth i consistently' is the wordplay.
'within' indicates a hidden word.
'ETHIC' is hidden within 'elizabeth i consistently'.
(Other definitions for ethic that I've seen before include "Moral value" , "System of principles" , "Moral principle" , "Code of principles" , "Ideology" .)