Related Clues:

• 'The Seven -- Mystery', a novel by Agatha Christie
• Workers with pitch forks?
• Turns up, Sidney goes all over American city hanging out with The Faces perhaps
• Some light emitters
• Two-element tubes
• Unidirectional conductors
• TV screen array
• Semiconductor devices
• Faces of watches
• Cellphone components
• Tubes with electrodes
• Picks up the phone to back what's spoken about novice
• Wristwatch faces
• Knobs on old radios
• Uses a rotary phone