Possible Clues:

• Scooter whose name is Italian for "wasp"
• Line of motor scooters
• Scooter favored by '60s British mods
• "Roman Holiday" vehicle
• "Roman Holiday" transport
• Motor-scooter name
• Hornet genus
• Turin two-wheeler
• Piaggio transportation line
• Maker of the LX 150 scooter