The term 'IN THING' is used to describe something that is popular or fashionable at a particular time. The crossword solutions for this term are STYLE (5 letters), RAGE (4 letters), FAD (3 letters), and TREND (5 letters). STYLE refers to the way something is designed, created, or presented, while RAGE is an intense feeling of anger. A FAD is a short-lived fashion or activity that is popular for a brief period of time, and a TREND is a general direction in which something is developing or changing.