You can also post in the music major forum, and maybe read the essay “Double Degree Dilemma” in the Read Me thread on that forum, which details options for music study.
When you mention music, people tend to mention schools with BM programs, However, if she does not want to do a BM program, there can be an issue with schools that offer a BM through an on campus conservatory or school of music: she needs to check and see if the best teachers, performances and resources go to the BM students. There is a range with this issue and some schools are fine, and offer excellent music to non=BM students (see Oberlin’s Musical Studies).
Her options are BM for clarinet, BA for music or anything else, double degree BA/BM ( in some cases BA/MM), double major major/minor. She can definitely major in something other than music and continue lessons (often funded and for credit) and EC performance, at schools that have NO BM program at all.
I would look into the latter option, honesty. And yes submit a supplement with video/recording, resume and LOR’s.