Related Clues:

• The 'pneumo' in pneumonia
• See 116-Across
• Chest organ
• It's breath-taking
• It's breathtaking
• See 52-Down
• Of sound mind
• Oxygen processor
• Place for a breath of fresh air?
• Air bag?
• Breathing space
• Breather
• Iron ___
• Breather?
• Lobed organ