Three-legged support (6)
I believe the answer is:
tripod
'three-legged support' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for tripod that I've seen before include "one appears to have three legs!" , "Three-legged stand as for camera" , "Stand for camera etc" , "Torpid (anag.)" , "Stand on three legs" .)