It collapses when theres anarchy or red revolution (5)
I believe the answer is:
order
'it collapses when theres anarchy' is the definition.
The definition suggests a singular noun which matches the answer.
'or red revolution' is the wordplay.
'revolution' shows that the letters should be reversed in order.
'red' written backwards gives 'der'.
'or'+'der'='ORDER'
Can you help me to learn more?
(Other definitions for order that I've seen before include "Arrangement; command" , "Command, mandate" , "Command; neatness" , "An authoritative command" , "Arrange < company" .)