Related Clues:

• It fills festival slot
• "Hard ___ to Follow" Brother Cane
• Warm-up or main
• Might be a warm-up one
• Nirvana "Lounge ___"
• Headliner is the "main" one
• Warm-up ___
• One Direction "___ My Age"
• It gets booked for show
• "America's Got Talent" segment
• Creation of congress
• Patriot ___
• To do the job in radioactive cloud
• One of two in 'Hamilton'
• Vegas routine