Related Clues:

• Always on the surface, never on the bottom
• It's all on top, but the end will do for 17 across
• Always on the top, never on the bottom
• Never at the bottom, always on the top (6)
• Always on top, never in the end
• Always on the top, never at the end
• 'Royalty or not, we all get one on ahead (5)'
• It gets seated at the dentist
• A thin coat that often cracks
• Show great glee with new headgear
• See 14
• 5 6s per head?
• There's a superficial pretence with the archdeacon always
• King Charles's peculiar governing power
• Major mark of forty times 1 across