Sentence:  I did book jackets and covers for paperback reprints : naked girls huddling in corners of dingy furnished rooms while at the <WSD>doorway</WSD> , daring the cops to take him , is the guy in shirt sleeves clutching a revolver . 
Meaning of the word marked with <WSD> tags:  the entrance (the space in a wall) through which you enter or leave a room or building; the space that a door can close