Related Clues:

• Chimney-shaft
• Duct for smoke
• A cleft for climbing - that could be my niche
• Smoke pipe; rock cleft
• Smoke a pipe for it
• Chimney vent
• Smoke outlet
• Escape viral illness, taking vitamin
• Heard of disease in smoky passage
• Smoke-duct in chimney
• Smoke pipe
• Smoking pipe responsible for speaker's complaint?
• Tube went rapidly, it is reported
• Duct for smoke/gases
• One's stacked sound boxes neatly at first on back of lorry