Disturbance after drink in vehicle (7)
I believe the answer is:
chariot
'vehicle' is the definition.
(chariot is a kind of vehicle)
'disturbance after drink' is the wordplay.
'disturbance' becomes 'riot' (I've seen this before).
'after' is a charade indicator (letters next to each other).
'drink' becomes 'cha' (I've seen this before).
'riot' after 'cha' is 'CHARIOT'.
'in' acts as a link.
(Other definitions for chariot that I've seen before include "ride in carriage" , "American religious folksong 'Swing low, sweet ...'" , "Two-wheeled horse-drawn vehicle used in battle" , "former military vehicle" , "Ben Hur's car" .)