The most common and most likely answer to this crossword clue is the 9 letter word DEBARRING
I've seen this crossword clue in Independent
D
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B
A
R
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Buddy explains!
The straight part
We know that "Prohibiting" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case prohibiting = debarring.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 DEBARRING mean?
DEBARRING verb- To exclude or shut out; to bar.
- To hinder or prevent.
- To prohibit (a person or company that has been convicted of criminal acts in connection with a government program) from future participation in that program.