Related Clues:

• Derby, for one
• Derby, e.g.
• Broadbrim, e.g.
• It may be tipped
• Bowler, for one
• Monopoly token choice
• Pillbox or porkpie
• Brimless cap
• It's sometimes passed for money
• Stovepipe, for one
• Something to check
• Tricorn, for one
• It might go over your head
• See 11-Across
• Winter accessory