A decree wrongly cited (5)
I believe the answer is:
Here is my best explanation:
'a decree' is the definition.
('edict' can be a synonym of 'decree')
'wrongly cited' is the subsidiary indication.
'wrongly' indicates anagramming the letters (I've seen this in other clues).
'cited' with letters rearranged gives 'edict'.
(Other definitions for edict that I've seen before include "Legally binding command", "Injunction", "An official command", "Order issued by an authority", "Official proclamation", "Official decree", "Declaration", "Pronouncement", "Cited (anag) - proclamation" and "Formal proclamation".)