Crossword Genius

Flight-board posting (3)

Ross

I believe the answer is:

eta

(Other definitions for eta that I've seen before include "When one is due" , "Greek letter - time due (abbr)" , "when you can hope to receive it" , "Greek letter E; estimated time of arrival (abbr.)" , "Basque separatist movement" .)

I've seen this clue in the Newsday.
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