Ore seeker (5)
I believe the answer is:
miner
'ore seeker' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for miner that I've seen before include "Underground labourer" , "Person who works underground" , "it's the pits, for me" , "One who digs for ore" , "One sent down for work" .)