Some great clarinet recordings

World Music in a Wide Sense
Anoar Brahem trio Astrakan Café (ECM 1718) with Barbaros Erköse on clarinet
Anoar Brahem trio Thimar (ECM) With John Surman playing bass clarinet (and saxophones)
Gianluigi Trovesi/Gianni Coscia

Modern Jazz
John Carter
Eric Dolphy On John Coltrane The Other Village Vanguard Tapes (Impulse!) with two beautiful versions of "Spiritual" and Dolphy playing bass clarinet.

Traditional Jazz
Barney Bigard
Albert Burbank On "Wooden Joe" Nicholas
Louis Cotrell
Johnny Dodds
Edmond Hall

Classical, and yes - in a wide sense
Kam The music of Lutoslawski