Possible Clues:

• One of TV's Simpsons
• Maggie's brother
• Toon troublemaker
• A Simpson
• Lionel --, composer and lyricist whose musicals include 'Oliver!'
• Lionel --, English composer and lyricist 1930-99
• Bratty Simpson kid
• TV character who says 'I didn't think it was physically possible, but this both sucks and blows'
• Ms. Krabappel's nemesis
• One of TV's Mavericks