Windows outage? (14)

I believe the answer is:

defenestration

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'windows outage?' is the definition.
The definition suggests a singular noun which matches the answer.

This is all the clue.

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(Other definitions for defenestration that I've seen before include "Opening extraction" , "Ejection from a window" , "projected through lights" , "Act of throwing out of a window" , "Act of ejecting someone through a window" .)

I've seen this clue in The Times.

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