French author never translated (5)
I believe the answer is:
verne
'french author' is the definition.
(Jules Verne)
'never translated' is the wordplay.
'translated' indicates anagramming the letters.
'never' anagrammed gives 'VERNE'.
(Other definitions for verne that I've seen before include "Jules --, French writer" , "Jules ..... wrote ` `20,000 Leagues under the Sea' '" , "See 27 Across" , "Jules --, French author" , "French novelist" .)