One of the great unaccompanied clarinet solos is Rhapsody by Willson Osborne. The difficulty is rated medium to medium difficult (grade 4-5), and is definitely approachable by a high school player. Osborne keeps the music very interesting and there is plenty of opportunity for expressive and technical playing.
The Rhapsody is very enjoyable to play and listen to. At only 4 1/2 minutes in length, it works well as a recital piece and it is a good audition piece as well. It is written for the B-flat clarinet.
I’m going to talk through the piece in detail, giving some advice on how to approach some of the tricky spots. If you don’t already own this piece, you will have difficulty following what I am talking about in the analysis. Make sure you have your music handy for full understanding! If you don’t yet own a copy, you can click on the link below and purchase it.