Possible Clues:

• Space flight takes one into sun source
• Told to take long, hard look where flight goes
• Where builder would put case for high-rise building?
• Mix thoroughly and put in a container for the flight
• Shaft in building housing steps
• Area not covered by flights?
• Shaft for flight giving way with light wind - oh dear!
• Way to publicise thoroughly where flights may be found
• Air pocket occurring mid-flight?
• Shaft George e.g. and have your say clearly