Door parts (6)
I believe the answer is:
hinges
'door parts' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for hinges that I've seen before include "A door swings on them" , "Movable joints between lid and box, say" , "Flexible joints" , "Depends on - like door?" , "Doors swing on them" .)