From the review:
Train of Thought is a party word game. Players take turns trying to get opponents to guess a particular word, giving only a 3 word clue – and one of those words must be from a prior answer! For each clue given, each player may make 1 guess. If none are correct, the clue-giver creates another clue, using one of the guesses and up to 2 other words.
When the word is correctly guessed, the guessing player and the clue giver each get one point, and the clue giver draws a new card and continues making clues. Get as many as you can in 2 minutes!
Train of Thought really makes you think differently than other games in the genre. An excellent party game!