Leader of crowd, proverbially, relegated for brawl (4)
I believe the answer is:
riot
'for brawl' is the definition.
(I've seen this in another clue)
'leader of crowd proverbially relegated' is the wordplay.
I cannot really understand how this works, but
'of' could be 'o' and 'o' is found within the answer.
The remaining letters 'rit' is a valid word which might be clued in a way I don't see.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for riot that I've seen before include "Violent disturbance by mob" , "Run amok" , "Uproar" , "Uprising" , "Public act of violence by an unruly mob" .)