Has his time come: Marshall Crenshaw clicks at the Vic

“I”m Marshall Crenshaw – power pop guru!” the musician jokingly announced after his first encore at the Vic Theatre Saturday night. As far as the packed house was concerned, Crenshaw couldn’t have been more correct. When he released his debut album in 1982, critics hailed Crenshaw as pop music’s proverbial next big thing. Looking out at the enthusiastic fans at the Vic, the bespectacled musician, who got his start in show business portraying John Lennon in “Beatlemania,” gave them a knowing smile.