Related Clues:

• First letters, of names say
• First letters and cities
• Great cities or large letters
• First letters and first cities
• Coverings, for heads say
• International headgear
• Headgear for internationals
• Letters for such as Dublin
• Largely letters for such as 16 down
• Baseball toppers
• They're billed at the ballpark
• Tops, like the first characters in ''Home and Away'' say?
• Baseball players' toppers
• They may be locked on a computer
• Mushroom tops