Related Clues:

• Plea
• Out for the accused
• ''M*A*S*H'' character
• Traffic cop's tool
• Defense, perhaps
• Weathercaster's tool
• Forecasting aid
• What stealth may avoid
• Legal defense
• Sonar's cousin
• Detecting device
• ''I was at home sleeping at the time,'' e.g.
• Early-warning device
• It might be airtight
• Control tower device