The most common and most likely answer to this crossword clue is the 6 letter word AFFRAY
I've seen this crossword clue in The Guardian
A
F
F
R
A
Y
More clues leading to the result AFFRAY
- A fine fellow, Raymond, in a fight
- A female cook describing a public brawl
- A very strong beam reveals disturbance
- Alpha Force cook embracing a public brawl
- Fight fish clinging to hook without starting to grimace
- A very noisy chap joined in a brawl
- Fracas of two females caught in a beam
- Look the worse for wear after a loud set-to
- A pair of females streak, creating disturbance
- I am ready, ignoring the odds, to accept following fight
Buddy explains!

The straight part
We know that "disturbance" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case disturbance = affray.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 AFFRAY mean?
AFFRAY noun- The act of suddenly disturbing anyone; an assault or attack.
- A tumultuous assault or quarrel.
- The fighting of two or more persons, in a public place, to the terror of others.
- Terror.
- To startle from quiet; to alarm.
- To frighten; to scare; to frighten away.