With 45-Down, displays during an online presentation ... or a hint to three pairs of answers in this puzzle (6)

I believe the answer is:

screen

(Other definitions for screen that I've seen before include "TV surface" , "Flat surface onto which images are projected" , "Show; cover" , "Test or examine for the presence of disease or infection" , "Protect or conceal" .)

I've seen this clue in The New York Times.

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