Possible Clues:

• Breathing: abbr.
• Poll answerer (Abbr.)
• In that order: Abbr.
• Bodily system that includes the lungs: abbr.
• Breathing (Abbr.)
• Court defendant: Abbr
• Breathing-related (Abbr.)
• Shortness of breath?
• Defendant in court: Abbr.
• Answer, as to an invitation: abbr.