Sculpt next to railway restaurant (7)
I believe the answer is:
carvery
'restaurant' is the definition.
(I know that carvery is a type of restaurant)
'sculpt next to railway' is the wordplay.
'sculpt' becomes 'carve' (I've seen this in another clue).
'next to' is a charade indicator (letters next to each other).
'railway' becomes 'ry' (abbreviation for railway).
'carve'+'ry'='CARVERY'
(Other definitions for carvery that I've seen before include "likely to be hot at 19 across [REASTAURANT]" , "Buffet with roasts" , "place to dine" , "Buffet serving sliced meat" , "Buffet serving roast meats from the joint" .)