New face at restaurant (4)
I believe the answer is:
cafe
'restaurant' is the definition.
(cafe is a kind of restaurant)
'new face' is the wordplay.
'new' indicates anagramming the letters.
'face' with letters rearranged gives 'CAFE'.
'at' acts as a link.
(Other definitions for cafe that I've seen before include "in which one had a meal?" , "Greasy spoon" , "snacks served here?" , "Coffee shop" , "Small informal restaurant" .)