The most common and most likely answer to this crossword clue is the 6 letter word STRAFE
I've seen this crossword clue in Independent
S
T
R
A
F
E
More clues leading to the result STRAFE
- Gunners captured by amphibious creatures mounting low attack
- British planes on time in southeast make low attack
- What Bren guns can do seconds after bombing
- Shoot from the air, moving faster
- Attack right back stops posing no threat
- Attack from air in last RAF exercise
- Faster-working machine-gun
- Could be faster to make fire from air
- Pepper and salt first after shaking
- Moving faster, attack from the air
Buddy explains!

The straight part
We know that "machine-gun" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case machine-gun = strafe.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 STRAFE mean?
STRAFE noun- An attack of machine-gun or cannon fire from a low-flying aircraft.
- A sideways movement without turning.
- To attack (ground targets) with automatic gunfire from a low-flying aircraft.
- To sidestep; to move sideways without turning (a core mechanic of most first-person shooters).