The wood Edward loaded into a vehicle (5)
I believe the answer is:
cedar
'the wood' is the definition.
(cedar is a kind of wood)
'edward loaded into a vehicle' is the wordplay.
'edward' becomes 'Ed' (short for Edward).
'loaded into' means one lot of letters goes inside another.
'a vehicle' becomes 'car' (car is a kind of vehicle).
'ed' put within 'car' is 'CEDAR'.
(Other definitions for cedar that I've seen before include "Raced around noble tree" , "Deodar" , "Tree giving fragrant wood" , "Leaving body" , "Raced around a great hardwood tree" .)