Related Clues:

• Telegram punctuation word
• Go no further
• Octagonal order
• Give kudos to
• Heed a red light
• Word on a red sign
• Wave to, as a taxi
• Period in English literature
• Cloud output, sometimes
• Familiar sign
• Signal, as a taxi
• Arresting word
• ''Hold the phone!''
• What you often do on the road
• Precipitation type