Possible Clues:

• Revelation
• The Observer intro is a revelation
• Unexpected revelation
• Startling revelation
• Surprising disclosure
• Shock to the system, and what the start of each answer to a starred clue can be
• Instrument for removing cataract perhaps is astonishing
• In the middle of storm, centre gets the first score - it's astonishing to one of the viewers
• Hitherto unforeseen revelation?
• Morning coffee, for one