Bird that's upset an Italian city (7)
I believe the answer is:
ravenna
'italian city' is the definition.
(I've seen this before)
'bird that's upset an' is the wordplay.
'bird' becomes 'raven' (raven is a kind of bird).
'that's upset' says the letters should be written backwards.
'an' backwards is 'na'.
'raven'+'na'='RAVENNA'
(Other definitions for ravenna that I've seen before include "battle" , "city in Italy" , "Italian city with mosaics" .)