A cleruchy in Classical Greece, was a specialized type of colony established by Athens. Wikipedia

Type of colony established by Athens Wikidata

A form of Athenian colony in the time of Ancient Greece, under which the settlers or cleruchs retained their citizenship, and were assigned plots, or kleroi, of agricultural land, while the community remained a political dependency of Athens. Wiktionary

A form of Athenian colony. Wiktionary (translation)