Possible Clues:

• It may take your breath away
• Condition of a street close to Howth around marina
• Chest disorder
• Hats off and briefly state complaint
• A guy's having year off? Headmaster received complaint
• Often-allergic attack
• Chronic breathing condition
• Piggy's problem in ''Lord of the Flies''
• Is maths a way to take your breath away?
• Complicated maths answer -- it might make you gasp