Shot traitor at restaurant (9)
I believe the answer is:
trattoria
'restaurant' is the definition.
(I've seen this before)
'shot traitor at' is the wordplay.
'shot' indicates anagramming the letters.
'traitor'+'at'='traitorat'
'traitorat' is an anagram of 'TRATTORIA'.
(Other definitions for trattoria that I've seen before include "where Italians eat" , "Italian eating establishment" , "Italian restaurant" , "Place to eat" .)