The most common and most likely answer to this crossword clue is the 6 letter word GUNMAN
G
U
N
M
A
N
More clues leading to the result GUNMAN
- Marooned pirate catching mum's assassin
- Leader in generalissimo has to dispirit criminal
- He may buy rounds and drain bottle after golf
- Good to reduce the courage of potential killer
- Alarm after game’s first shooter
- Under a thousand dollars to castrate bank-robber?
- Grenade launcher provides cover to disconcert sniper
Buddy explains!

The straight part
We know that "bank-robber" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case bank-robber = gunman.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 GUNMAN mean?
GUNMAN noun- A criminal armed with a gun, especially a professional killer.