The most common and most likely answer to this crossword clue is the 7 letter word UNHITCH
I've seen this crossword clue in Financial Times
U
N
H
I
T
C
H
More clues leading to the result UNHITCH
- Release body of Manhattan Yank
- Free university tuition at last? There's a problem with that
- Leaders of Ukraine never had strong desire to be free from attachment
- By the middle of June, husband has yearning for divorce, perhaps
- Hun running amok craving divorce?
- Correct hunch about the thing to disengage
- World leaders' hard urge to disentangle
- Hun's sad, yearning for divorce!
- Disentangle problem in security council
- Release a local jerk
Buddy explains!

The straight part
We know that "Disentangle" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case disentangle = unhitch.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 UNHITCH mean?
UNHITCH verb- To disconnect; to detach; to undo that which is hitched.