Mineral gets almost exhausted in this state (6)
I believe the answer is:
oregon
'this state' is the definition.
(Oregon is an example)
'mineral gets almost exhausted' is the wordplay.
'mineral' becomes 'ore' (ore is a kind of mineral).
'gets' is a charade indicator (letters next to each other).
'almost exhausted' becomes 'gon' (I am not sure about this - if you are sure you should believe this answer much more).
'ore'+'gon'='OREGON'
'in' is the link.
Can you help me to learn more?
(Other definitions for oregon that I've seen before include "No gore in this western American state" , "Timber" , "Part of the US" , "Old trail led here" , "The American state is no goer, strangely" .)