Related Clues:

• Some circus sounds
• Part of the jungle cacophony
• Music to 17-Across' ears
• Stooges' laughs
• Hilarity
• Rolling-in-the-aisles sounds
• Music to a comic's ears
• Shows approval, as a crowd
• Some zoo sounds
• Jokes
• Shouts of doubt
• Sounds of derision
• Comic's rewards
• Hearty laughs
• It's known as the best medicine