Eugene's state (6)
I believe the answer is:
'eugene's state' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for oregon that I've seen before include "Gooner (anag) - US state" , "The American state is no goer, strangely" , "US NW coastal state" , "US north-western coastal state" , "Salem is this State's capital" .)