Complex sentence: He was previously in a band called "Clint" (named so because one of the members was named Clint), who released two demos, a 7 Inch, and a full-length disc.
Split into simpler sentences: He was previously in a band called "Clint" (named so because one of the members was named Clint). Who released two demos, a 7 Inch, and a full-length disc.