Clancy Sigal (born 1926) is an American novelist and screenwriter born in the Chicago of Al Capone, where his father was a labour organizer, who packed a derringer to protect himself against the Mob. He joined the U.S. Army and served as a GI, rising to the rank of sergeant, in the European theatre and was present at the Nuremberg Trials, where he intended shooting Hermann Goering, but only succeeded in engaging him in a stare-down unsuccessfully. He himself was blacklisted from Hollywood after refusing to sign a false boilerplate affidavit accusing other members of Hollywood studios who had been Joseph McCarthy's House Un-American Activities Committee, which, he argued, was influenced by congressional anti-semites. Sigal argues that it was as much an anti-semitic as anti-communist. He arrived as an illegal immigrant in Great Britain and lived with Doris Lessing. He helped R. D. Laing create Kingsley Hall. He was The Observer correspondent for the 1984 Los Angeles Olympic Games, and decided to settle in Los Angeles after falling in love.
He was a part of the Philadelphia Association experiment with R. D. Laing at Kingsley Hall. He was one of several co-writers of the screenplay for the 2002 Salma Hayek film Frida, based on the book Frida: A Biography of Frida Kahlo by Hayden Herrera. His wife, Janice Tidwell Sigal, is featured in the recent BBC TV series The Trap. He is perhaps best known for his autobiographical novel Going Away (1961). In 2013 he published Hemingway Lives! Why Reading Ernest Hemingway Matters Today. (OR Books) He is a professor emeritus at the Annenberg School of Journalism.
- "Harry Bridges" The New York Times, January 7, 1973, p. 388
- "Zone of the Interior" (2005) Pomona Press ISBN 1-904590-10-1
- A Woman of Uncertain Character: The amorous and radical adventures of my mother Jennie (who always wanted to be a respectable Jewish mom) by her bastard son (2006) New York: Carroll & Graf. ISBN 0-7867-1748-3
- Reviews for The New York Review of Books
- On the run again
- On the run again version at the Guardian
- Letter to the Editor, The Observer
- Clancy Sigal at the Internet Movie Database
- A trip to the far side of madness
- "Remembering Mom, the Labor Organizer", Morning Edition, National Public Radio, September 4, 2006.
- Sigal as a staff member of the UCLA Daily Bruin
-  Clancy Sigal's personal story, "Married to the Cause" on how me met his wife through the early women's movement in the United Kingdom, circa 1970.
- "Liberal Fatalism Lit the Fire," Los Angeles Times, Jun 10, 1992, page 7 Sigal on the first Rodney King verdict.
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- 2014 interview withPhillip Adams regarding Sigal's life, including the Hollywood blacklist, Lauren Bacall, Doris Lessing, R.D. Laing, Australian cinema, etc (audio)