City in Germany (7)
'city in germany' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for essen that I've seen before include "Industrial city of northwest Germany" , "German place name" , "Industrial centre of the Ruhr" , "Main industrial city of the Ruhr" , "Krupp HQ (Ger.)" .)
(Other definitions for cologne that I've seen before include "Scent - German city" , "German river port" , "Foreign city" , "European city" , "German city and mild perfume" .)