Stand or fall over a piece of wood (6)
I believe the answer is:
tripod
'stand' is the definition.
(tripod is a kind of stand)
'fall over a piece of wood' is the wordplay.
'fall over' becomes 'trip' (I've seen this in another clue).
'a piece of wood' becomes 'od' (I am not sure about this - if you are sure you should believe this answer much more).
'trip'+'od'='TRIPOD'
'or' is the link.
Can you help me to learn more?
(Other definitions for tripod that I've seen before include "Something on three legs" , "Support needed" , "Stand for camera etc" , "Three-legged stand as for camera" , "Torpid (anag.)" .)