I’d never heard of Crusell. As usual most good stuff I find is ‘accidental’ – just stumbling around in cyberspace; and that’s how I found Crusell.
Anyway this guy Crusell (15 October 1775 – 28 July 1838) was a Swedish-Finnish clarinetist, composer and translator, “the most significant and internationally best-known Finnish-born classical composer and indeed, — the outstanding Finnish composer before Sibelius”.
Here’s his clarinet concerto #2 in F minor / second movement.