Related Clues:

• Reporter's source, at times
• Unexpected info source
• Be a squealer
• Air problem
• Not hold water, say
• Puddle producer
• Have a big mouth
• Radiator problem
• Ruin the surprise
• Be less than watertight
• Tell anonymously
• Scuba diver's worry
• Boater's worry
• Betray a confidence, perhaps
• Faucet defect