The most common and most likely answer to this crossword clue is the 7 letter word DAGGERS
I've seen this crossword clue in The Daily Telegraph
D
A
G
G
E
R
S
Buddy explains!

The straight part
We know that "weapons" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case weapons = daggers.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 DAGGERS mean?
DAGGERS noun- A stabbing weapon, similar to a sword but with a short, double-edged blade.
- The text character †; the obelus.
- A point scored near the end of the game (clutch time) to take or increase the scorer's team lead, so that they are likely to win
- To pierce with a dagger; to stab.
- A timber placed diagonally in a ship's frame.