The term 'Tricky Stroke' is a type of shot in the game of billiards. The masse, which is a five letter solution to the crossword, is a specific type of tricky stroke in which the cue ball is struck with a high degree of spin, causing it to curve around an obstacle and hit the target ball. This shot requires a great deal of skill and precision, as the angle and spin of the cue ball must be carefully calculated in order to achieve the desired result.