Related Clues:

• Cheer inside the theme entries
• 'De-fense! De-fense!'
• Crowd cry
• Halftime cry
• Jubilant shout
• When repeated, an old-fashioned cheer
• 'Yahoo!'
• Old college cheer
• Word of exhortation
• Crowd cheer
• Motivation exclamation
• 8-Across' shout
• When doubled, ardent
• Rooting word
• Booster's cry