Clue: Early-warning device

Answer: RADAR

Length: 5

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Similar Clues:

• Early warning device (SMOKEALARM with 10 letters)
• Early flag warning (DONTTREADONME with 13 letters)
• Warning devices (e.g. ALARMS with 6 letters)
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• Species that serves as an early warning system (CLIMATECANARY with 13 letters)
• Device that was dial-up in its early days (MODEM with 5 letters)
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