The crossword solution for the term 'Like Unger, Felix' is NEAT, which is a four-letter word. Felix Unger is a character from the play and movie The Odd Couple, written by Neil Simon. He is portrayed as an obsessive-compulsive NEAT freak who is constantly trying to keep his environment clean and orderly. Therefore, the answer to the crossword clue is NEAT, as it describes someone who is like Felix Unger in terms of their neatness.