Stop ass going into Italian city (4,2,2)
I believe the answer is:
pack it in
'stop' is the definition.
(I've seen this before)
'ass going into italian city' is the wordplay.
I cannot really see how this works, but
'into' could be 'in' and 'in' is located in the answer.
'italian' could be 'it' (abbreviation for Italian) and 'it' is found within the answer.
The remaining letters 'pack' is a valid word which might be clued in a way I don't understand.
This explanation may well be incorrect...
Can you help me to learn more?
(Other definitions for pack it in that I've seen before include "Give over" , "Stop working - or stuff suitcase?" , "Quit" , "Slangily, stop doing it - stuff suitcase" , "How will you get all that stuff into your suitcase" .)