Data, for short (4)
I believe the answer is:
info
'data for short' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for info that I've seen before include "Intelligence (abbr)" , "Facts; knowledge gained" , "Data (abbrev.)" , "Gen (colloq.)" , "Data received and understood (abbr)" .)