Possible Clues:

• Atmosphere over (area of) earth
• Where jumbo shows speed?
• Pilot circles parts of Paris in this
• Atmosphere at resort near Clare is for high-flyers
• Here planes fly in twos, nose to tail, needing skilful pilot
• Feeling mushy peas around cold room above Iceland, say
• Controlled region above a country
• What all planes fly in
• Sets up English school investing in island area where pilots can work unheeded
• Where planes can fly