The most common and most likely answer to this crossword clue is the 6 letter word REVOKE
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More clues leading to the result REVOKE
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 = revoke.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 REVOKE mean?
REVOKE noun- The act of revoking in a game of cards.
- A renege; a violation of important rules regarding the play of tricks in trick-taking card games serious enough to render the round invalid.
- A violation ranked in seriousness somewhat below overt cheating, with the status of a more minor offense only because, when it happens, it is usually accidental.
- To cancel or invalidate by withdrawing or reversing.
- To fail to follow suit in a game of cards when holding a card in that suit.
- To call or bring back.
- To hold back.
- To move (something) back or away.
- To call back to mind.