Related Clues:

• Dissertation
• Op-ed piece
• Melody
• ''Civil Disobedience,'' e.g.
• Endeavor
• Piece of Bacon?
• Recurring melody
• Emerson product
• Subject
• Homework assignment, sometimes
• Basis of a musical composition
• Main idea
• Schoolboy's grammatical exercise
• Crossword feature
• Swift's ''A Modest Proposal,'' e.g.