Sly stratagem is a term used to describe a clever and cunning plan or trick. It is often used in a negative sense, as it implies deception or manipulation. The two crossword solutions for this term are RUSE and PLOY. A RUSE is a deceptive maneuver or trick, while a PLOY is a clever scheme or plan. Both words imply a certain level of cunning and deception, making them suitable solutions for the term sly stratagem.