The most common and most likely answer to this crossword clue is the 4 plus 3 letter word TEST BAN
I've seen this crossword clue in The Daily Telegraph
T
E
S
T
B
A
N
More clues leading to the result TEST BAN
- Key article on experimental weapons agreement
- Card lets dubious 21 enter international bar
- International agreement that sees top cricketer suspended for a while?
- Good man with graduate detained by figure in measure against nuclear weapons
- Examine graduate on new agreement on weapons
- Battens downwith this agreement
- Treaty, perhaps best one to stop initiations in nuclear trials coming about
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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.