A homogeneous mixture has a uniform composition at the scale being considered. Salt fully dissolved in water is a familiar example: a small sample from one part has approximately the same composition as a sample from another.
The mixture still contains more than one substance. It can also be made in different proportions, unlike a pure compound with a fixed chemical composition. This distinction is useful because “clear,” “uniform” and “pure” answer different questions. A liquid may look clear and still contain several dissolved substances.