The most common and most likely answer to this crossword clue is the 7 letter word BRIGAND
I've seen this crossword clue in The Daily Telegraph
B
R
I
G
A
N
D
More clues leading to the result BRIGAND
- Bird flapping round horse upset robber
- Robber‘s gear concealed in belt
- Thief’s equipment pinched by musicians
- Naval jail and potential inmate
- 2 — master together with criminal
- Robber baron’s beginning with purchasing outfit
- Robber in group seizing equipment
- Criminal outfit takes on another outfit
- Equipment nicked by gang robber
- Criminal gang includes doctor
Buddy explains!

The straight part
We know that "Outlaw" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case outlaw = brigand.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 BRIGAND mean?
BRIGAND noun- An outlaw or bandit.