Wild moor originally featuring in literary work (6)
I believe the answer is:
stormy
'wild' is the definition.
(similar in meaning)
'moor originally featuring in literary work' is the wordplay.
'originally' indicates taking the first letters.
'featuring in' means one lot of letters goes inside another.
'literary work' becomes 'story' (story is a kind of literary work).
The first letter of 'moor' is 'm'.
'm' inserted within 'story' is 'STORMY'.
(Other definitions for stormy that I've seen before include "Full of violent outbursts" , "'. . . . . . Weather' (sung by Billie Holiday, say)" , "Gusty" , "Rough" , "Full of angry outbursts" .)