Crossword Genius

SFO posting (3)

Ross

I believe the answer is:

eta

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

This is all the clue.

(Other definitions for eta that I've seen before include "Basque separatist movement" , "Militant Basque organisation - Greek letter" , "when it might reach us?" , "Foreign letter" , "European separatists, initially" .)

I've seen this clue in the Newsday.
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