Related Clues:

• See 26
• See 10
• See 4
• Buttons, perhaps silver, appearing in drill
• See 17
• See 24
• Call for a quiet time
• Make of car or part of it
• Safety measure testable when crashing
• Call for quiet period
• Person serving king's son has maturity
• Sheet of buttons, say?
• How one is on a horse determines the throne
• Young male worker's mature under pressure
• Attendant - part of book