Related Clues:

• Performed on "American Idol"
• "__ you!"
• Let in on
• Performed a cappella
• Took effect
• Sang like a canary, so to speak
• Chattered idly revealing information
• Divulge secrets
• Gave an account
• Related to what 30 across may have done, by the sound of it
• Made music with the bloody French?
• Related to the sound of the bell
• All this is entirely 30 across in the past
• All this is what it amounts to
• Performed, in a way