Revolutionary crowd interrupts road race, causing outrage (11)
I believe the answer is:
abomination
'outrage' is the definition.
(thesaurus)
'revolutionary crowd interrupts road race' is the wordplay.
'revolutionary crowd' becomes 'bom' (I can't explain this - if you can you should give a lot more credence to this answer).
'interrupts' indicates putting letters inside.
'road' becomes 'ai' (I've seen this in other clues).
'race' becomes 'nation' (both can mean a national or ethnic group).
'bom' inserted inside 'ai' is 'abomi'.
'abomi'+'nation'='ABOMINATION'
'causing' acts as a link.
Can you help me to learn more?
(Other definitions for abomination that I've seen before include "Feeling of hatred or disgust" , "Cause of hatred or disgust" , "Action that is vile" .)