Answer:

padlock

Answer	Crossword Clue
PADLOCK	Cellar door securer
PADLOCK	Door security
PADLOCK	Theft protection

PADLOCK	Close up an establishment.
PADLOCK	Close, as a building
PADLOCK	Yale turnout?

Crossword

a puzzle consisting of a grid of squares and blanks into which words crossing vertically and horizontally are written according to clues.