Cliquey
The Century Dictionary and Cyclopedia
Disposed to form small exclusive sets or cliques; characteristic of cliques and cliquery.
Wiktionary, Creative Commons Attribution/Share-Alike License
adjective.
Having the characteristics of a
clique
Word Usage
"Electronic music can be inspiringly imaginative, but its subgenres can get pretty cliquey, which is why Carl Craig plays with different tempos and styles under as many monikers, and techno stalwart "Mad""