Related Clues:

• Mimic a lion
• Sound from the den?
• Do much more than giggle
• Really laugh
• 52-Down part
• Laugh hysterically
• Roll in the aisles
• Sound from 35-Across
• Wildfire sound
• Thunderous response
• Have a hearty laugh
• Big noise
• Emulate a woman, in 'I Am Woman'
• Indy 500 sound
• Sound under the big top