The most common and most likely answer to this crossword clue is the 9 letter word DECREEING
I've seen this crossword clue in The Sunday Telegraph
D
E
C
R
E
E
I
N
G
Buddy explains!
The straight part
We know that "Ordering" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case ordering = decreeing.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 DECREEING mean?
DECREEING verb- To command by a decree.
- The giving out of a decree.