Answer: lookout

AnswerCrossword Clue
LOOKOUTBe careful
lookoutwatch
lookoutperson for keeping watch
lookoutone engaged in keeping watch
lookoutplace for keeping watch
LOOKOUTRanger's station
LOOKOUTMember of a heist crew
LOOKOUT"Duck!"
LOOKOUTSentinel
LOOKOUT"Incoming!"
LOOKOUTSentry
LOOKOUTWatchman
LOOKOUTBeware.
LOOKOUTBeware!
LOOKOUTProspect.
LOOKOUTCrow's nest.
LOOKOUTTake care.
LOOKOUTWords of warning
LOOKOUT"Watch it!"