Related Clues:

• Medium for communication
• Official who ensure fair play
• Signal to and summon, say a taxi
• Wireless
• Greet or applaud
• Precipitation of ice pellets
• It used to be called the wireless
• Official to ensure fair play
• In brief, a soccer controller
• Frozen rain or Roman greeting
• Marconi invented it
• It was first called the wireless
• Old Roman salute, or frozen pellets
• Say hello to the ice pellets
• An ancient Roman hello