Fund-raiser in vehicle, one by a restaurant (9)
I believe the answer is:
cafeteria
'restaurant' is the definition.
(I know that cafeteria is a type of restaurant)
'fund-raiser in vehicle one by a' is the wordplay.
'fund raiser' becomes 'fete' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'in' is an insertion indicator.
'vehicle' becomes 'car' (car is a kind of vehicle).
'one' becomes 'I' (Roman numeral).
'by' means one lot of letters go next to another.
'fete' placed inside 'car' is 'cafeter'.
'cafeter'+'i'+'a'='CAFETERIA'
Can you help me to learn more?
(Other definitions for cafeteria that I've seen before include "place of refreshment" , "greasy spoon?" , "Self-help facility" , "Self-service eating place" , "Where one scoffs" .)