Related Clues:

• Penn, for one
• Princeton's League
• Columbia, e.g.
• Ms. Golightly
• Clinging vine
• Prickly shrub
• -- League
• Some Christmas greenery
• Trellis plant
• Collegiate climber
• Yuletide decoration
• Wrigley stuff
• Delaware state tree
• Vine
• It's on some hallowed walls