Beethoven's vehicle? (3)
I believe the answer is:
van
I believe this is a double definition.
'beethoven's' is the first definition.
('van Beethoven' can be a synonym of 'beethoven')
'vehicle?' is the second definition.
(van is a kind of vehicle)
(Other definitions for van that I've seen before include "Forefront, vehicle" , "Commercial vehicle at head of army" , "Forefront as of an army" , "Army front or business vehicle" , ". . . Morrisson (singer)" .)