"The Naked and the Dead” author (6)
I believe the answer is:
mailer
'the naked and the dead author' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for mailer that I've seen before include "writer from America" , "person at the post?" , "Norman --, US author" , "One putting armour on" , "novelist" .)