Possible Clues:

• Alarm's gone off, keeping right time
• Suddenly spook
• Restaurant toured by golfer in retirement producing surprise
• Give a turn
• Surprise visit -- finally left in tears, sadly
• Surprise with a "Boo!"
• Rattles when it's false alarm
• Place the street art over the French alarm
• Cubist art lecture providing surprise
• Astonish, as lesson and lecture do