Related Clues:

• Suburban pest
• Undercover operator
• Subterranean pest
• Pentagon problem
• It may do a number on your slumber
• Warning bell
• Balloonist's worry
• Faucet fault
• Unofficial news source
• Eye opener, of a sort
• Spymaster's worry
• Chili-hotness measure
• Blemish
• Pipe problem
• Perturbation