Possible Clues:

• Her cat is provided with a free air passage
• Tube announcement of line closure in Aldgate area
• Bronchoscopist's view
• Tube carrying air to the lungs
• Aircraft ultimately reach a turbulent airway
• Pain in mouth mostly finding part of throat
• Medical term for windpipe
• Airway with skill being set up, mostly inexpensive
• Inspirational passage?
• Contribution towards ultra-cheap passage