Revolt which is mostly very minor (6)
I believe the answer is:
mutiny
'revolt' is the definition.
(I know that mutiny is a type of revolt)
I don't understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for mutiny that I've seen before include "Open rebellion against constituted authority" , "Revolt against authority" , "Rebellion as on Bligh's Bounty" , "Insurrection" , "Rising, rebellion" .)