Possible Clues:

• Gilbert and Sullivan's first collaboration
• Greek dramatist given page in student's submission
• Greek dramatic poet, regarded as the founder of Greek tragedy
• Dissertation about origin of prominent Greek poet
• Greek dramatist/poet; he spits (anag.)
• -, or the Gods Grown Old, early G&S work
• Sixth century BC Greek poet, origin of word for actor
• Ancient Greek poet
• Best-known agents casting English or Greek tragedian