Vicar left rear of vicarage catching what bus? (7)
I believe the answer is:
vehicle
'bus?' is the definition.
(bus is a kind of vehicle)
I don't understand the rest of the clue.
Can you help me to learn more?
(Other definitions for vehicle that I've seen before include "4 x 4" , "Eg, car" , "Medium" , "Conveyance for transporting passengers or goods" , "wheels" .)