Where servers cut, machine with battery dead (7)
I believe the answer is:
carvery
'where servers cut' is the definition.
(servers carve meat for you at a carvery)
'machine with battery dead' is the wordplay.
'machine with battery' becomes 'car'.
'dead' becomes 'very' ('dead' can mean extremely, eg 'dead good').
'car'+'very'='CARVERY'
(Other definitions for carvery that I've seen before include "Buffet serving sliced meat" , "Buffet restaurant" , "food outlet" , "where the main course is meat" , "Buffet with roasts" .)