Possible Clues:

• An amazing thing that takes the lid off?
• What 5 was likely to do - something startling
• Glance by batsman is an unexpected revelation
• Watch the first batsman carefully - it might be revealing
• Fact that brings great surprise - wakes you up
• Unexpected revelation from ophthalmic surgeon?
• Surprising fact - like wake up call
• Amazing thing, an alarm-clock?
• Regard leading batsman as something remarkable
• Person who launched London tourist attraction gets a surprise