showing family closeness, especially by supporting one another against other people

exclusive, select

not willing to admit members or mix with others considered to be inferior in social position, education etc

unshared, restricted

showing (too) much preference, devotion, to one side, cause, group etc; a person committed to a political party, group or cause

interested, factional

(of air) thin, clear and clean

exclusive

a sect or sects

narrow-minded, exclusive