The most common and most likely answer to this crossword clue is the 9 letter word AGITATION
A
G
I
T
A
T
I
O
N
More clues leading to the result AGITATION
- Answer I got at in dreadful worry
- A soldier at Waterloo, say, heading off trouble
- Unrest when a foreign soldier replaces leader in headquarters
- Disturbance produced by taint Iago concocted
- Jumping to it again, creating a disturbance
- Anxiety caused by flying to it again
- Changing to it again creates trouble
- Stirring, stormy sonata in G – it’s not Saint-Saëns’ first, fourth or last
- Distress of American soldier, first on base to fail
- A sacred book with heavyweight describing India’s struggle
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 = agitation.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 AGITATION mean?
AGITATION noun- The act of agitating, or the state of being agitated; the state of being moved with violence, or with irregular action; commotion.
- A stirring up or arousing; disturbance of tranquillity; disturbance of mind which shows itself by physical excitement; perturbation.
- Excitement of public feeling by discussion, appeals, etc.
- Examination or consideration of a subject in controversy, or of a plan proposed for adoption; earnest discussion; debate.