Servant after crowd in violent disorder (7)
I believe the answer is:
rampage
'violent disorder' is the definition.
(synonyms)
'servant after crowd' is the wordplay.
'servant' becomes 'page' (I've seen this before).
'after' is a charade indicator (letters next to each other).
'crowd' becomes 'ram' (I've seen this before).
'page' after 'ram' is 'RAMPAGE'.
'in' is the link.
(Other definitions for rampage that I've seen before include "Rush around violently and uncontrollably" , "Rioting, for example" , "Frenzy" , "destructive behaviour" , "Destructive spree" .)