Answer:

redalert

Answer	Crossword Clue
REDALERT	Danger signal
REDALERT	Top-level warning
REDALERT	Prepared-for-attack status

REDALERT	Crisis status
REDALERT	Ready-for-the-worst status
REDALERT	Warning to the crew, on "Star Trek"
REDALERT	Critical period
REDALERT	State of high alarm
REDALERT	State of emergency
REDALERT	Grave warning
REDALERT	State of maximum readiness

REDALERT	Critical warning
REDALERT	Crisis situation
REDALERT	Serious warning
REDALERT	Crisis signal
REDALERT	Emergency state
REDALERT	"Star Trek" situation
REDALERT	Crisis period
REDALERT	Starfleet captain's declaration

REDALERT	Attack warning.
REDALERT	Signal of imminent attack
REDALERT	Maximum vigilance warning
REDALERT	Bridge situation
REDALERT	Pre-meltdown signal, maybe
REDALERT	"The enemy is upon us!"
REDALERT	Period of crisis
REDALERT	Warning on the Enterprise

REDALERT	"Danger!"
REDALERT	Klaxon-sounding occasion
REDALERT	Time for crisis management
REDALERT	Warning usually accompanied by a flashing
REDALERT	Signal to scramble
REDALERT	Imminent danger warning
REDALERT	Warning to heed
REDALERT	Imminent-danger warning

REDALERT	"Battle stations!"