Escher museum site, with "The" (5)
I believe the answer is:
hague
'escher museum site with the' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for hague that I've seen before include "politician" , "The city of the International Court of Justice" , "The ..... is the Netherlands seat of government" , "William -, former Conservative leader" .)