Restaurant employee (6)
'restaurant employee' is the definition.
(restaurants employee waiters)
This is all the clue.
(Other definitions for waiter that I've seen before include "Herr Ober (Ger.)" , "Servant in bar" , "Attendant" , "Restaurant worker" , "One paid to serve" .)
(Other definitions for sous-chef that I've seen before include "Kitchen deputy" , "Subordinate kitchen worker" , "Second in command in a hotel kitchen" .)