The most common and most likely answer to this crossword clue is the 4 letter word STEN
I've seen this crossword clue in The Daily Telegraph
S
T
E
N
More clues leading to the result STEN
- Gun carried by worst enemy
- Such as rapidly discharges / a dart of pain to Rob Roy, say
- One repeatedly fired from EastEnders
- US secretary with no love for deadly piece
- Takes back gun
- Jock’s bound to take tour away from his taxman
- Kind of gun with catches reversed
- Machine gun
- One shot in EastEnders
- Weapon in rear with no end of power
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.