Related Clues:

• One of a smart phone pair
• These ad breaks that pilot has?
• Teacher fixed equipment for language lab?
• Modern headphone
• Earphones from leading group
• Cans top teacher prepared
• Cans provided by principal teacher with group
• Traffic controller's wear
• Canal speaker
• Half a musical duo?
• Part of a listening pair
• A gamer may talk into one
• Small source of music
• Smartphone plug-in
• Receiver covering ears