The most common and most likely answer to this crossword clue is the 6 letter word FORBID
I've seen this crossword clue in Financial Times
F
O
R
B
I
D
More clues leading to the result FORBID
- Prohibit going either way in crossing
- Deny being in favour of proposal
- Female replaces male in gloomy bar
- Though in favour of an acceptable offer, say no
- Outlaw in favour of offer
- Deny purpose of attending auction?
- Amount offered lower than fine gold bar
- Brave investigator initially interrupting US president gets ban
- Stop because it's tender
- Stop to offer
Buddy explains!

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 FORBID mean?
FORBID verb- To disallow; to proscribe.
- (ditransitive) To deny, exclude from, or warn off, by express command.
- To oppose, hinder, or prevent, as if by an effectual command.
- To accurse; to blast.
- To defy; to challenge.