Totò le Mokò
The mobster Pep le Mok dies during a shootout with the police. His gang decide that his successor will be a relative of his from Naples: Antonio Lumaconi, a street musician.
Starring Totò, Carla Calò, Gianna Maria Canale, Luigi Pavese, Enzo Garinei, Franca Marzi, Elena Altieri, Mario Castellani, Carlo Ninchi
Watch "Totò le Mokò" on Amazon released in 1949. It's a comedy movie, and has a rating of 6.8 out of 10 from Imdb which is usually fine for this kind of movie, and is currently only available for purchase or rent.