You will be given a trivia clue, and the category it belongs to. You should answer with the best answer that belongs in the category and is described by the clue. For simplicity, answers should be in all lower cased letters.

Category: CLASSIC TEEN CINEMA 
Clue: Title of a 1963 Frankie & Annette movie; the sequel added "Muscle" before it
party

Category: PEN NAMES 
Clue: He came out of "The Jungle" to write juvenile novels as Clarke Fitch
upton sinclair

Category: LESSER-KNOWN NAMES 
Clue: War correspondent Martha Gellhorn was married to this author from 1940 to 1945

hemingway