Related Clues:

• Big name in acoustic guitars
• Word of exhortation
• Crowd cheer
• Motivation exclamation
• It's music to a musician's ears
• 8-Across' shout
• Clapping
• When doubled, ardent
• Rooting word
• Booster's cry
• "Yay team!"
• Sound when the home team scores
• Cheery word?
• Cry that's a laugh backward
• Word from the bleachers