Deport Italian involved in the old business? (9)
I believe the answer is:
extradite
'deport' is the definition.
(I know that deport can be written as extradite)
'italian involved in the old business?' is the wordplay.
'italian' becomes 'it' (abbreviation for Italian).
'involved in' is an insertion indicator.
'the old' becomes 'ex' (prefix meaning former or onetime).
'business?' becomes 'trade' (trade is a kind of business).
'ex'+'trade'='extrade'
'it' put into 'extrade' is 'EXTRADITE'.
(Other definitions for extradite that I've seen before include "Hand over to a foreign jurisdiction" , "Hand over for trial in another country" , "Hand over for trial to another government" , "Deport" , "Hand over to authorities of another country" .)