Related Clues:

• Help retired head of lyceum to make call
• Audio engineer's device
• Keypad predecessor, in some cases
• Sound engineer’s control
• Lessen, with ''down''
• Call and help returning student
• One who fixes flats?
• Oscilloscope knob
• Use a phone, old-style
• Toaster turner
• Increase slowly, with ''up''
• Mixer knob
• Word after speed or drunk
• Old TV control
• Sliding control often found on a mixing desk