Door-hanging device (5)
I believe the answer is:
hinge
'door-hanging device' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for hinge that I've seen before include "Movable swinging joint" , "Joint between door and frame" , "Device for letting door etc swing" , "Circumstance upon which subsequent events depend; door facilitator" , "Moving joint" .)