Stay for an execution (8)

I believe the answer is:

reprieve

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'stay' is the definition.
(I've seen this in another clue)

I don't understand how the remainder of the clue works.

(Other definitions for reprieve that I've seen before include "Punishment cancellation" , "left off the hook" , "Give stay of execution to" , "Delay execution of" , "Pardon - respite" .)

I've seen this clue in The Globe and Mail.

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