Related Clues:

• Do not delay
• Substitutes (for)
• Opera part
• Don't just sit there
• Opera parts
• Make a scene?
• Front
• Misbehave, with 'up'
• See 71-Across
• Book that includes the reign of Tiberius
• Don't just stand there
• Circus sight
• Does a thespian's turn
• It may be heroic
• Opera or ballet part