Related Clues:

• It may be beaten or bucked
• It makes a bit of a stir
• Kind of phone
• Warning fire
• See 51-Across
• Modus operandi
• Battery
• Alerting light
• See 56-Down
• Communism or capitalism, e.g.
• Prisoner's spot
• Broken-down motorist's signal
• Solar ___
• Danger signal
• Emergency signal