Related Clues:

• Makes a long-distance call
• Cheer words
• Grandstand shouts
• Sounds angry
• Shouts while shaking one's pompoms
• Shows team spirit
• Traditional cheers
• Shouts out
• Arena cries
• War whoops
• Pep rally cries
• Sounds from stands
• Athletic support?
• Three cheers, maybe
• There's a lot of them, by the sound of it