The most common and most likely answer to this crossword clue is the 6 letter word TRACER
T
R
A
C
E
R
More clues leading to the result TRACER
- Some soldiers not exactly right to return ammunition
- Missile makes terrible crater
- One follows bullet’s end, one going fast
- Window decoration keeps out unknown missile
- Sort of bullet for people in case of terror
- Bullet needs little time — fast mover
- Last shot, one’s within rights to get a bullet
- Bullet missing one from erratic shot
- Bullet ends in target under tree
Buddy explains!

The straight part
We know that "a bullet" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case a bullet = tracer.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 TRACER mean?
TRACER noun- A compound, element, or isotope used to track the progress or history of a natural process.
- A round of ammunition for a firearm that contains magnesium or another flammable substance arranged such that it will burn and produce a visible trail when fired in the dark.
- The act or state of tracking or investigating something.
- A request to trace the movements of a person or an object, such as a shipment.
- A person who traces something.
- A device or instrument used to assist in making tracings.