Related Clues:

• Poor reception
• Ghost's shout
• ''To Kill a Mockingbird'' character
• Word that leads to some starts?
• Word of disapproval
• Warning from Fluffy
• Leak giveaway
• Serenade the ump
• Respond to a bad call
• Half a gaffe?
• Radiator noise
• Frightening sound
• Sibilant boo
• Startling shout
• It causes many to start