"Make it snappy!” letters (4)

I believe the answer is:

asap

(Other definitions for asap that I've seen before include "At one's earliest convenience" , "As soon as possible (abbrev.)" , "Common acronym for quick-as-you-can" , "Notation meaning without delay, fast as you can" , "Notation meaning with minimum delay" .)

I've seen this clue in The Wall Street Journal.

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