As adjectives the difference between clannish and cliquish
is that clannish is of or related to a clan while cliquish is of or pertaining to a clique.
clannish
English
Adjective
(
en adjective)
Of or related to a clan.
Socially exclusive.
Synonyms
* (socially exclusive) clanny
cliquish
English
Adjective
(
en adjective)
of or pertaining to a clique
tending to associate with a small and exclusive group