The clarinet is like an unconcerned man sitting on a park bench. He's looking around but is not really interested in anything. And if something–anything–happens, he can successfully pretend he's not there.
Nothing jazzy in Goodman's tone; tempo is slower than I would expected. Some phrasing is maybe not typical but that can be only my imagination.
Composer: Wolfgang Amadeus Mozart
Work: Clarinet Concerto, III. Rondo: Allegro
Recording: Benny Goodman, Boston Symphony Orchestra, Charles Munch