A PART of a puzzle%3F A puzzle feature is a component of a puzzle that adds to the challenge and complexity of the puzzle. It can be anything from a hidden word or phrase, to a set of clues that must be solved in order to complete the puzzle. Puzzle features can also include anagrams, rebuses, and other types of wordplay. The four-letter CLUE for this term is 'PART, ' which refers to the PART of the puzzle that makes it more difficult and interesting.