Related Clues:

• Breathing tubes
• Branches of the trachea
• Breathing passages
• Does your little brother get an inch of breath through them?
• Greek character following old network on inner tubes
• Brother makes up short distance with breathing tubes
• Robin is prepared to install central heating pipes
• Branches of the windpipe
• Robin flying around church's airy spaces
• In airways, one horse loses its tail, another gains one
• Having mustang, no old horse, I need breathers
• Bobtailed horse greeting airlines
• Choir travelling round North on British Airways
• Forks of the windpipe
• Lung air passages