Related Clues:

• Fluffy, as cake
• Flag or flare
• Far from strenuous
• Alexandria lighthouse, one of the Seven Wonders
• Airy
• It's often on at night
• Insubstantial
• Word with 69-Down
• Lighthouse of Alexandria site
• End of a tunnel, proverbially
• Nod or wink
• See 10 Down
• Lamp
• Ptolemy's lighthouse locale
• Warning notice