Related Clues:

• Comic's favorite sound
• Sound of breaking up?
• See 58-Across
• 'Good one!'
• Laugh sound
• That's a laugh!
• Titter
• Response to a joke
• Response to a gag
• Joke response
• 'Funny!'
• Theme of the puzzle
• ''Turnabout is fair play!''
• ''Serves you right!''
• 'That's a laugh!'