Literary sobriquet is a term used to describe a nickname or pseudonym given to a famous writer. The two crossword solutions for this term are 'PAPA' (4 letters) and 'Papahemingway' (13 letters). The former is a reference to Ernest Hemingway, who was often referred to as 'PAPA' by his family and friends. The latter is a combination of the words 'PAPA' and 'Hemingway', which is a direct reference to the author.