Possible Clues:

• Roar of laughter
• A loud uninhibited laugh
• Nonsense rejected with a coarse laugh
• Cobblers answer with a loud laugh
• Burst of deep loud hearty laughter
• A lot of stuff in joker's come-back gets a laugh
• Coarse laugh
• Roar with laughter at nonsense spoken to a workers' leader
• Laugh loud and long
• Humbug attracting endless reverence? That’s a laugh