War and Peace author (7)
I believe the answer is:
tolstoy
'war and peace author' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for tolstoy that I've seen before include "Count Leo . . . . . . ., author of 'War and Peace'" , "Russian novelist" , "Lost toy of the Russian author" , "Author of Anna Karenina, d.1910" , "Writer of War and Peace, d.1910" .)