The most common and most likely answer to this crossword clue is the 5 letter word EDICT
I've seen this crossword clue in The Guardian
E
D
I
C
T
More clues leading to the result EDICT
- What press chief may do about Conservative decree
- Film about police department overturning decree
- Readmit city, oddly absent in decree
- Order change — change initially involved
- Correct to ring head of Charolais bull
- Order observed in the dictionary
- Instruction redraft safeguards clubs
- Tory introduced to rewrite proclamation
- Caught inside, backing current order
- Order thesaurus in online form?
Buddy explains!

The straight part
We know that "Order" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case order = edict.The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.
What does EDICT mean?
EDICT noun- A proclamation of law or other authoritative command.