Answer: sentinel

AnswerCrossword Clue
SENTINELSoldier on guard.
sentinelsentry
sentinelto stand guard
SENTINELMan on the alert
SENTINELDispatched via overhead train?
SENTINELVedette
SENTINELFigure on the watch
SENTINEL"And the ... stars set their watch": T. Campbell
SENTINELPossible watcher on the Rhine
SENTINELOne standing guard
SENTINELWatchtower occupant
SENTINELMilitary guard.
SENTINELLookout.
SENTINELU. S. observation plane.
SENTINELWatcher.
SENTINELWatchman
SENTINELName for a newspaper.
SENTINELFrancisco's role in "Hamlet."
SENTINELGuard.
SENTINELMilitary lookout
SENTINELOne on guard duty
SENTINELWatchful one
SENTINELWatchtower guard
SENTINELWatchguard
SENTINELSoldier on guard duty
SENTINELOrlando paper
SENTINELLookout
SENTINELOrlando newspaper
SENTINELWatchdog
SENTINELGuard