The term CROSSWORD PART can be summarized as a four-letter GRID that is used in crossword puzzles. It is a type of word puzzle in which clues are given and the player must fill in the blanks with the correct answers. The GRID is made up of black and white squares, with the black squares representing the letters of the answer. The player must use the clues to figure out the correct answer and then fill in the GRID accordingly.