Related Clues:

• ''Jay'' or ''em'' attachment
• Gnarls Barkley lead singer ___-Lo
• Average average
• Congressional leader?
• ''Cats'' starts with it
• Part of a copyright symbol
• Middling exam mark
• Communist leader?
• It's passable
• Comet head?
• It begins 'cube,' but not 'circle'
• It begins "cube," but not "circle"
• It's average for students
• Cold start?
• Alphabet letter