Decree cited in a different way (5)
I believe the answer is:
edict
'decree' is the definition.
(I know that decree can be written as edict)
'cited in a different way' is the wordplay.
'in a different way' is an anagram indicator (letters ordered a new way).
'cited' with letters rearranged gives 'EDICT'.
(Other definitions for edict that I've seen before include "Authoritative decree" , "Authoritative ruling" , "Pronouncement" , "Canon" , "Declaration" .)