The most common and most likely answer to this crossword clue is the 9 letter word UNHITCHED
I've seen this crossword clue in Financial Times
U
N
H
I
T
C
H
E
D
Buddy explains!
The straight part
We know that "Released" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case released = unhitched.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 UNHITCHED mean?
UNHITCHED verb- To disconnect; to detach; to undo that which is hitched.
- Unattached.
- Unmarried; single.