Small issue causing insubordination (8)
I believe the answer is:
sedition
'insubordination' is the definition.
The answer and definition can be both acts as well as being singular nouns.
Maybe you can see a link between them that I can't see?
'small issue' is the wordplay.
'small' becomes 's' (abbreviation - e.g. clothes size).
'issue' becomes 'edition' (edition is a kind of issue).
's'+'edition'='SEDITION'
'causing' acts as a link.
Can you help me to learn more?
(Other definitions for sedition that I've seen before include "Illicit undermining of the powers that be" , "Stirring up of rebellion or disorder" , "that promotes rebellion" , "incitement to rebel" , "revolt" .)