Possible Clues:

• Current struggle: opening of door covered by plant
• Old walls may be so, I contended
• Ivy covered
• One competed with climbers
• I struggled, choked by climber?
• Like the outfield wall at Wrigley Field
• Overgrown, like college walls
• With climbers furious, short of peak, expedition leader dug in
• One competed with climbers in prominent positions
• Like many academic halls