Some pattern within you (depending on where the dirt is) is in need of a good scrubbing....
(Filth) Adirty face in a dream represents a rare art, while a filthy body represents a sinful person....
To dream of using clothes pegs suggests that you are trying to get your thoughts together, probably about a relationship. You may be feeling anxious about a particular relationship...
Dirt is associated with farming, and therefore with fertility and growth. Something underneath the ground symbolizes the unconscious. Because of the social importance of cleanlines...