Our violent riots — threatening this? (10)
I believe the answer is:
revolution
'threatening this?' is the definition.
The definition suggests a singular noun which matches the answer.
'our violent riots' is the wordplay.
'riots' indicates an anagram.
'our'+'violent'='ourviolent'
'ourviolent' with letters rearranged gives 'REVOLUTION'.
Can you help me to learn more?
(Other definitions for revolution that I've seen before include "Beatles song" , "Cycling" , "Beatles hit" , "See 5" , "Complete turn" .)