### Clue: Mafioso cut down in wicked vendetta's finale (9)
### Answer: GOODFELLA 
 ### Explanation: Definition: Mafioso
 FELL(to cut down, a tree, say) **contained in**(in) GOOD(excellent/in slang, "wicked") + **last letter of**(…'s finale) "vendetta".
Defn: Americanism for a member of the Mafia crime organisation/a Mafioso.