The most common and most likely answer to this crossword clue is the 9 letter word CANCELLED
I've seen this crossword clue in Financial Times
C
A
N
C
E
L
L
E
D
Buddy explains!

The straight part
We know that "off" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case off = cancelled.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 CANCELLED mean?
CANCELLED verb- To cross out something with lines etc.
- To invalidate or annul something.
- To mark something (such as a used postage stamp) so that it can't be reused.
- To offset or equalize something.
- To remove a common factor from both the numerator and denominator of a fraction, or from both sides of an equation.
- To stop production of a programme.
- To suppress or omit; to strike out, as matter in type.
- To shut out, as with a railing or with latticework; to exclude.
- To kill.
- To cease to provide financial or moral support to (someone deemed unacceptable). Compare cancel culture.
- No longer planned or scheduled.
- (of a mail item) Marked over the stamp, to show that the stamp has been used.