Related Clues:

• Derby, for one
• Derby, e.g.
• Low-___
• Broadbrim, e.g.
• It may be tipped
• Judge's object
• Bowler, for one
• Monopoly token choice
• Pillbox or porkpie
• It's sometimes passed for money
• Stovepipe, for one
• Solfge syllables
• Something to check
• Tricorn, for one
• It might go over your head