What makes a pop musician a maverick? Clothes? Haircut? An unusual perceptiveness in venues? A mute refusal to quit? Or even their music? It's a question raised by Pop Mavericks, a new season at London's Barbican cinema. Included are recent documentaries on Dean Reed, a Californian(!?- Admin) singer world Health Organization defected to East Germany to become the 'Red Elvis'; UK indie trailblazers the Dolly Mixtures and Felt; and Sweden's Namelosers and Gonks, whose claim to fame is that they supported the Stones on their 1965 inflict to Malmo.