German steel city (5)
I believe the answer is:
essen
'german steel city' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for essen that I've seen before include "Main industrial city of the Ruhr" , "German industrial city on the Ruhr" , "Industrial centre of the Ruhr" , "German place name" , "city in the Ruhr valley" .)