Check on a violent disturbance in carriage (7)
I believe the answer is:
chariot
'carriage' is the definition.
(I know that Chariot is a type of carriage)
'check on a violent disturbance' is the wordplay.
'check' becomes 'ch' (abbreviation).
'on' is a charade indicator (letters next to each other).
'violent disturbance' becomes 'riot' (a riot is a disturbance or rebellion).
'ch'+'a'+'riot'='CHARIOT'
'in' acts as a link.
(Other definitions for chariot that I've seen before include "Two-wheeled carriage of ancient times, as used by Ben Hur" , "former military vehicle" , "ride in carriage" , "Old vehicle (of fire?)" , "Roman two-wheeled vehicle" .)