1) An exclusive group 2) Band 3) Camp 4) Circle 5) Circle of chums 6) Circle of friends 7) Clique 8) Clique or circle 9) Cliquish group 10) French word used in English 11) Ingroup 12) Inner circle 13) Pack 14) Select set 15) Tight circle Found on https://www.crosswordclues.com/clue/coterie
Co`te·rie' noun [ French, probably from Old French coterie servile tenure, from colier cotter; of German origin. See 1st Cot .] A set or circle of persons who meet familiarly, as for social, literary, or other purposes; a clique. 'The queen of your coterie .' Thac... Found on http://www.encyclo.co.uk/webster/C/169
a group of people who associate closely. · an exclusive group; clique. · a group of prairie dogs occupying a communal burrow. Found on https://www.infoplease.com/dictionary/coterie