Related Clues:

• Sound from a 98-Across
• Rumble in the jungle?
• Lion's bellow
• Leonine bellow
• Lion's call
• Sound at the start of MGM films
• Sound at the start of an MGM movie
• Scream with laughter
• Jungle noise
• MGM opening sound
• Zoo sound
• Deafening noise
• Sound of a crowd
• Thunderous noise
• Be boisterous