Three-legged stand (6)
I believe the answer is:
tripod
'three-legged stand' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for tripod that I've seen before include "Support needed" , "Pay heed" , "Three-legged support" , "Three-legged stand as for camera" , "Torpid (anag.)" .)