The most common and most likely answer to this crossword clue is the 7 letter word BANNING
I've seen this crossword clue in The Times
B
A
N
N
I
N
G
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 = banning.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 BANNING mean?
BANNING verb- To summon; to call out.
- To anathematize; to pronounce an ecclesiastical curse upon; to place under a ban.
- To curse; to execrate.
- To prohibit; to interdict; to proscribe; to forbid or block from participation.
- To curse; to utter curses or maledictions.
- The act by which something is banned; a prohibition.