Related Clues:

• O.K. mark
• Choir leader?
• It's soft in ''Cinderella''
• Start to crumble?
• ''Jay'' or ''em'' attachment
• Gnarls Barkley lead singer ___-Lo
• Average average
• Part of a copyright symbol
• Middling exam mark
• Communist leader?
• It's passable
• Comet head?
• It's average for students
• Alphabet letter
• Artichoke heart?