What is the ruling on things bought with ill-gotten money after repentance, and must one dispose of them?

If the money belongs to a specific person and must be returned to them, but they cannot be reached or are unknown, then it should be given as charity on their behalf. If the money was acquired through an illicit act, such as usury (riba), then an amount equivalent to it should be spent on general Muslim welfare. As for clothes bought with this money, there is no harm in benefiting from them, because the prohibition is attached to the earner's responsibility, not to the specific item itself.