"I need it yesterday!" (4)

I believe the answer is:

asap

(Other definitions for asap that I've seen before include "yesterday?" , "Notation for urgent, quick as you can (4)" , "As soon as you can, initially" , "Notation or acronym meaning without avoidable delay" , "Common acronym for quick-as-you-can" .)

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

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