City on the Ruhr (5)
'city on the ruhr' is the definition.
(German city on the Ruhr river)
This is all the clue.
(Other definitions for essen that I've seen before include "German industrial centre" , "city in the Ruhr valley" , "Krupp HQ (Ger.)" , "German place name" , "Industrial centre of the Ruhr" .)
(Other definitions for eilat that I've seen before include "Red Sea resort" , "city" , "Gulf of Aqaba port" , "Israel's Red Sea port" , "Israeli resort" .)