Related Clues:

• Edges
• Fedora features
• 55-Across's lacks
• Derby features
• Fezzes lack them
• Margins
• Hat parts
• Overflows (with)
• Coffee-pouring limits
• Fezzes' lack
• Is full to the edge
• Bowlers have them
• Edges of hats
• Batsmen's primary edges? Bowlers', more likely
• Hat features