The average crossword puzzle supplies the potential solver with a number of things:
i) a diagram made up of black and white squares, the white squares to be filled with the letters of the answer words
ii) clues indicating in turn each of the words referred to above.
"A Clueless Crossword,"
Word Ways: Vol. 5
, Article 9.
Available at: http://digitalcommons.butler.edu/wordways/vol5/iss3/9