Possible Clues:

• A subscriber toomertà, Dr Keaton abandons university
• Member of criminal organisation
• De Niro role, frequently
• Family member
• Sombre assembly imprisons thick-head criminal
• Original film with old boy knocking out a US criminal
• Second best criminal runs for hood
• Mafioso trashed Rome around summer time
• Don maybe a family man?
• Enormous gun finally replaced by British gang member