Possible Clues:

• Exemplar of corporate malfeasance
• Company that went bankrupt in 2001
• Texas-based scandal subject
• Kenneth Lay's scandalized company
• Subject of the 2003 book 'Power Failure'
• Defunct scandal-plagued company
• 2001 headline maker
• Big bankruptcy of 2001
• Scandal-plagued giant
• Company whose failure brought down an accounting firm