Fairy tale setting (6)
I believe the answer is:
castle
'fairy tale setting' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for castle that I've seen before include "Fort" , "Dover, perhaps" , "Chess piece and grand house" , "E.g. Harlech, Beaumaris, Windsor" , "Chateau" .)