1. in a manner that shows strong loyalty to one's own group and excludes or distrusts outsiders

Examples

• The family clannishly refused to hire anyone outside their relatives.
• They clannishly stuck together and avoided mixing with other groups.
• The organization operated clannishly, favoring members over qualified outsiders.
• He clannishly defended his friends even when they were clearly wrong.
• The community clannishly protected its own interests at the expense of the broader society.