Nevada copper town (3)
I believe the answer is:
ely
'nevada copper town' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for ely that I've seen before include "Fenland cathedral town" , "English cathedral city" , "Diocese in Eastern England" , "Small city in Cambridgeshire" , "Cathedral city in East Anglia" .)