The most common and most likely answer to this crossword clue is the 9 letter word FIREBRAND
F
I
R
E
B
R
A
N
D
More clues leading to the result FIREBRAND
- Dismiss Ibsen character as a radical
- Dismiss kind, wildly passionate individual
- Following start of improvement, update image of agitator
- Troublemaker sacked for pinching grain husks
- If upset, change the image of troublemaker
- Energetic person wants motor racing to update for new image
- Troublemaker takes sword to tree with energy
- Radical change to sport’s corporate image
- Inspire Jo to be a rebel
- Sack comedienne who’s a troublemaker?
Buddy explains!

The straight part
We know that "a rebel" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case a rebel = firebrand.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 FIREBRAND mean?
FIREBRAND noun- An argumentative troublemaker or revolutionary; one who agitates against the current situation.
- A torch or other burning stick with a flame at one end.