Related Clues:

• Booster rocket
• Rustler
• Bleacher creature
• Ventilation source
• Foldable cooler
• Engine cooler
• 'Go, team!' screamer
• Nicotine or caffeine, e.g.
• Note taker?
• Big supporter
• Fence user
• One in need of a fence, perhaps
• Bleacher bum
• Inventory taker?
• One taking things badly?