breakin Unlawful entry Police matter It may be evidenced by shattered glass House robbery Get past the lock Enter unlawfully Cause for alarm? Part of a heist, maybe Pick a lock, say Guess someone's password, say Do a hacker's job Burglar's entry Watergate, for starters Make a bad entrance? Burglary ... or a hint to 17/18-, 26/29-, 47/51- and 62/63-Across Cause for an alarm Illegal entry Train a tyro Make submissive burglars do this Enter forcibly Burglary ... or a hint to Holiday on popular train Cause for alarm