Decree cited incorrectly (5)
I believe the answer is:
edict
'decree' is the definition.
(I know that decree can be written as edict)
'cited incorrectly' is the wordplay.
'incorrectly' is an anagram indicator (I've seen this in other clues).
'cited' with letters rearranged gives 'EDICT'.
(Other definitions for edict that I've seen before include "Formal order" , "Decree by authority" , "Pronouncement" , "Authoritative ruling" , "Legally binding command" .)