In-flight info, for short (3)
I believe the answer is:
eta
'in-flight info for short' 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 "character abroad?" , "Something like 10 [RHO]" , "Greek letter E; estimated time of arrival (abbr.)" , "indicating when flight is due" , "Greek H" .)