conspiracy = "a theory of conspiracy"

[W Brewer]

<Co-conspirator> seems to be needed to unambiguously indicate non-extended
meaning of conspirator: <<<IMDb, The Conspirator. Mary Surratt is the lone
female charged as a co-conspirator in the assassination trial of Abraham
Lincoln. As the whole nation turns against her, she is forced to rely on
her reluctant lawyer to uncover the truth and save her life.>>>

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