Where many Germans are turning back from Lyonesse (5)
I believe the answer is:
essen
'where many germans are turning back' is the definition.
The answer is a location as well as being a singular noun. This is suggested by the definition.
'lyonesse' is the wordplay.
'ESSEN' is hidden back-to-front in amongst the letters.
But, I'm not sure how this is indicated.
'from' acts as a link.
Can you help me to learn more?
(Other definitions for essen that I've seen before include "Main industrial city of the Ruhr" , "German industrial city on the Ruhr" , "city in the Ruhr valley" , "European city" , "German industrial centre" .)