Possible Clues:

• Top gear?
• Sombreros, e.g
• Porkpies, e.g.
• Ascot races fashion feature
• "___ off to you!"
• "Billy Two ___" (1973 Gregory Peck film)
• Propeller beanies, e.g
• Fez, toque, and tam
• Tipped items
• Boaters and bonnets