Related Clues:

• Cloud's place
• ''Look, up in the ---!''
• Number
• ___-blue
• Thin air
• Word with light or line
• It's overhead
• Anesthesia of old
• Knock-out gas, once
• Old sleep inducer
• Upper regions
• It's over your head
• Chicken Little's concern
• Astronomer's focus
• It's up there