Related Clues:

• "Gimme a C!" e.g.
• Express approval, in a way
• Pretentious, insincere language (with 5-Across)
• Curtain-call sound
• Clean erasers
• Cheerleader's forte
• Show you liked the show
• Shout
• Speak up, really
• Sidelines cheer
• Noise of thunder
• Show approval
• Thunderous sound
• Loud call
• Put your hands together