Crossword clue: author of the thirteenth tribe
1 answer found in Letterora's clue database (Wikidata facts, Open Trivia DB, WordNet and Webster definitions — all licensed sources).
Possible answers
koestler
8 letters
wd-fact-v3
British writer (born in Hungary) who wrote a novel exposing the Stalinist purges during the 1930s (1905-1983)