Decree cited wrongly (5)
I believe the answer is:
edict
'decree' is the definition.
(I know that decree can be written as edict)
'cited wrongly' is the wordplay.
'wrongly' is an anagram indicator.
'cited' anagrammed gives 'EDICT'.
(Other definitions for edict that I've seen before include "Legally binding proclamation" , "Declaration" , "Decree by authority" , "Legally binding command" , "Authoritative decree" .)