Cliquish

(a.) of or pertaining to a clique; disposed to from cliques; exclusive in spirit.

Thesaurus Entries

arrogant, clannish, cliquey, contemptuous, contumelious, disdainful, elect, ethnocentric, exclusive, haughty, scornful, select, selective, sneering, sniffy, snobbish, snobby, snooty, snotty, supercilious, toploftical, toplofty, withering