caption head
n.— «Lane also had drum and bugle corps experience from performing with his college troupe. And he had already established a company, Front and Center Contracting, that not only had an experienced staff of marching band instructors (or “caption heads,” as they?re called in the business), but the company also had a prepared show.» —“Lane leads unique culture called OHS marching band” by Bill Livick Oregon Observer (Oregon, Wisc.) Mar. 12, 2005. (source: Double-Tongued Dictionary)