Legend of marvellous empty landscape (5)
I believe the answer is:
fable
'legend' is the definition.
('fable' can be a synonym of 'legend')
'marvellous empty landscape' is the wordplay.
'marvellous' becomes 'fab' (slang abbreviation of fabulous).
'empty' means to remove the middle letters.
'landscape' with its centre removed is 'le'.
'fab'+'le'='FABLE'
'of' is the link.
(Other definitions for fable that I've seen before include "Myth, legend" , "Short moral story" , "Story, often with moral" , "Aesop story" , "Aesop's story?" .)