The crossword solutions for the term 'Stevenson Scoundrel' are 'Hyde' (4 letters) and 'MrHyde' (6 letters). The term is a reference to Robert Louis Stevenson's 1886 novella 'The Strange Case of Dr. Jekyll and Mr. Hyde'. In the story, Mr. Hyde is a malevolent character who is the alter-ego of the protagonist, Dr. Jekyll. The term 'Stevenson Scoundrel' is used to refer to the character of Mr. Hyde, who is seen as a scoundrel in the novella.