She claims that the police have a 'vendetta' against her. [=that the police are deliberately and unfairly trying to cause trouble for her]
He waged a personal 'vendetta' against his rivals in the Senate.
(..) in the east, and there will be peace. I must have strict assurance from Corleone. As time goes by and his position becomes stronger, will he attempt any individual vendetta? We are all reasonable men. We don't have to give assurances. You talk about vengeance. Will vengeance (..)1972 The Godfather