Related Clues:

• Test-driven vehicle (Abbr.)
• Item in a music producer's in-box
• Wannabe rock star's tape
• Take for a test drive
• For-show model
• Prototype, for short
• Hopeful singer's tape
• Garage band tape, perhaps
• Aspiring musician's handout
• Public protest
• Dealer's car
• Detroit player
• Sliding piece in a cylinder
• Points about driving rod
• Driving rod in engine