Skyscraper __ Cleaners Go Aloft With a Squeegee
Puzzle 12 of Aliens Pack
Question is: Skyscraper __ Cleaners Go Aloft With a Squeegee
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.