__ Display; Seen by Customers Entering a Store

Puzzle 6 of Buying Books Piece of Cake Pack

Question is: __ Display; Seen by Customers Entering a Store

and the answer is: WINDOW

Word Meaning:

WINDOW — An opening, usually covered by one or more panes of clear glass, to allow light and air from outside to enter a building or vehicle.

Definitions from Wiktionary.