It's often left hanging (3)
I believe the answer is:
art
'it's often left hanging' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for art that I've seen before include "Painting, for instance" , "Eg, paintings, sculpture" , "crafty conduct" , "Works in a gallery" , "-- Garfunkel, singer" .)