Vehicle really for restaurant (7)
I believe the answer is:
carvery
'for restaurant' is the definition.
(I've seen this before)
'vehicle really' is the wordplay.
'vehicle' becomes 'car' (car is a kind of vehicle).
'really' becomes 'very' (I've seen this before).
'car'+'very'='CARVERY'
(Other definitions for carvery that I've seen before include "Buffet-style restaurant" , "where the main course is meat" , "Buffet serving roast meats from the joint" , "cafe" , "likely to be hot at 19 across [REASTAURANT]" .)