Ore is refined in the wood (5)
I believe the answer is:
osier
'wood' is the definition.
(I've seen this before)
'ore is refined' is the wordplay.
'refined' indicates an anagram.
'ore'+'is'='oreis'
'oreis' is an anagram of 'OSIER'.
'in the' is the link.
(Other definitions for osier that I've seen before include "Willow growing shoots used in basketwork" , "Withy" , "Basket-maker" , "Willow for basket making" , "Wetland willow" .)