Possible Clues:

• Alma mater of presidents #41, 42 and 43
• Losing day, postpone returning from college
• Skull & Bones school
• Home of the Ivy League's Bulldogs
• Harvard foe
• The key to a US university education?
• University Emma Watson turned down in favor of Brown
• 'Boola Boola' territory
• Ivy with deep roots
• Whiffenpoof's school