Uproar after fellow kills president in ceremonial vehicle (7)
I believe the answer is:
chariot
'ceremonial vehicle' is the definition.
'chariot' can be an answer for 'vehicle' (chariot is a kind of vehicle). I am unsure of the 'ceremonial' bit.
'uproar after fellow kills president' is the wordplay.
'uproar' becomes 'riot' (I've seen this before).
'after' is a charade indicator (letters next to each other).
'fellow kills president' becomes 'cha' (I can't explain this - if you can you should believe this answer much more).
'riot' put after 'cha' is 'CHARIOT'.
'in' acts as a link.
Can you help me to learn more?
(Other definitions for chariot that I've seen before include "former military vehicle" , "'Two-wheeled, horse-drawn vehicle (7)'" , "ride in carriage" , "American religious folksong 'Swing low, sweet ...'" , "Two-wheeled carriage of ancient times, as used by Ben Hur" .)