Related Clues:

• Cunning, but not to start with, having information on gas
• O for this help up a mountain!
• Have a breather but must not stop working
• Life support that's elementary?
• Abundant gas
• Ill-used sort of tent
• Colourless odourless gas, the life-supporting component of the air
• Gas of old soldier about unknown unknown
• Breather from running nullified on reflection
• Atomic No. 8
• Cross between love and longing welcoming good atmosphere
• Vital gas
• Organ of breathing
• Oh, sounds like it's in the tent
• Scuba gear element