Marooned Queen, maybe, retreating to dramatic castle (8)
I believe the answer is:
elsinore
'castle' is the definition.
(I've seen this before)
I can't explain the rest of the clue.
Can you help me to learn more?
(Other definitions for elsinore that I've seen before include "Relies on to find Hamlet's castle in Denmark" , "Location for Hamlet" , "Tragic scene" , "Danish city" , "haunted castle?" .)