Food in Salerno, shocking (4)
I believe the answer is:
nosh
'food' is the definition.
(nosh is a kind of food)
'in salerno shocking' is the wordplay.
'in' indicates the answer is hidden within the clue.
'NOSH' is hidden within 'salerno shocking'.
(Other definitions for nosh that I've seen before include "Food (coll)" , "A slang meal" , "(Eat) a snack" , "Food (Yiddish)" , "cuisine" .)