 The list of clues gives hints of the locations of some of the shaded squares even before one starts solving them, e.g.there must be a shaded square where a row having no clues intersects a column having no clues.A fill-in crossword (also known as crusadex or cruzadex) features a grid and the full list of words to be entered in that grid, but does not give explicit clues for where each word goes.