The most common and most likely answer to this crossword clue is the 6 letter word MUTINY
I've seen this crossword clue in The Guardian
M
U
T
I
N
Y
More clues leading to the result MUTINY
- Rebellion of small proportions I'm doubtful about leading
- My unit is involved in open uprising
- Greek character heads insignificant rebellion
- Insubordination in Spain’s greatly outside the box
- Revolt by male leaving relative small following
- . Largely quiet, very little rebellion
- My unit represented in strike
- Greek character leading small rebellion
- Insurgency you reported within two minutes
- Greek character leads insignificant rebellion
Buddy explains!

The straight part
We know that "strike" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case strike = mutiny.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 MUTINY mean?
MUTINY noun- An organized rebellion against a legally constituted authority, especially by seamen against their officers.
- Violent commotion; tumult; strife.
- To commit mutiny.