A good example of this can be a snare track, or bass track which may be weak or dynamically inconsistent: running them through the Clipper and raising the level will saturate them nicely making them more present and bold in the mix.
Be careful not to overdo it as too much distortion can be difficult to blend well in the soundscape of a mix.
Of course the clipping effect achieved with controls set according will prevent digital overs with a pleasing sound free of distortion.