The most common and most likely answer to this crossword clue is the 6 letter word SECEDE
I've seen this crossword clue in The Guardian
S
E
C
E
D
E
More clues leading to the result SECEDE
- Dry old PMquit
- Withdraw from paradise, briefly after a moment
- Partly withdraw, making borders of state change and decrease
- Understand about the month having turned, so withdraw
- Church of England deacon’s first in diocese to pull out
- Break from Church doctrine’s first in diocese
- Withdraw to have 31 days back in Rome?
- Break away from predecessors in retreat
- Second prime minister, not the last, to leave an alliance
- Withdraw notice, accepting month in retirement
Buddy explains!

The straight part
We know that "withdraw" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case withdraw = secede.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 SECEDE mean?
SECEDE verb- To split from or to withdraw from membership of a political union, an alliance or an organisation.
- To split or to withdraw one or more constituent entities from membership of a political union, an alliance or an organisation.