The Land of the Blessed (6)
I believe the answer is:
avalon
'the land of the blessed' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for avalon that I've seen before include "Blessed Celtic isle" , "Where King Arthur was conveyed after death" , "Resting place of King Arthur" , "Isle of Celtic myth" , "Arthur's Seat" .)