Possible Clues:

• Biological partitions
• Nasal walls
• Places for some nose piercings, technically
• Nasal dividers that may be 'deviated'
• Philly transit system
• BART : San Francisco :: ___ : Philadelphia
• Phila. bus-and-train overseer
• Barriers a pet's destroyed
• Brown needs a little time to replace current divisions of the airways
• Nose parts