The most common and most likely answer to this crossword clue is the 9 letter word NORMATIVE
I've seen this crossword clue in The Guardian
N
O
R
M
A
T
I
V
E
More clues leading to the result NORMATIVE
Buddy explains!

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 NORMATIVE mean?
NORMATIVE adjective- Of or pertaining to a norm or standard.
- Conforming to a norm or norms.
- Attempting to establish or prescribe a norm.