a small group of secret plotters, as against a government or person in authority.

the plots and schemes of such a group; intrigue.

a clique, as in artistic, literary, or theatrical circles.

to form a cabal; intrigue; conspire; plot.

noun

scheme , conspiracy , intrigue , collusion , connivance , machination , camarilla , camp , circle , clan , clique , coterie , council , faction , junta , party , plot , ring