". . . you get the idea," for short (3)
I believe the answer is:
etc
'you get the idea for short' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for etc that I've seen before include "'And the rest, in short (3)'" , "And so on, in brief" , "And so forth (abbr)" , "And so on, briefly" , "Etcetera (abbrev.)" .)