Spin-off on Mary Alice Druhan’s “one-handed clarinetist”, this is maybe the “one-thumbed clarinetist”. An approach based on using the plugs Mary Alice uses to allow playing with one hand only. (Better diagram of the plugs from Dr. Druhan). You can buy a full box of work-alike plugs at Amazon — convenient for folks like me who lose small objects easily.
Exercises to reduce left thumb stress