What is the song that goes like the clarinet the clarinet goes doodle doodle doodle doodle det?

The song you are referring to is likely "Rhapsody in Blue" by George Gershwin. This iconic piece features a prominent Clarinet solo at the beginning that is characterized by the repeated "doodle doodle doodle doodle det" motif. "Rhapsody in Blue" is a cornerstone of 20th-century American music, blending classical and jazz elements in a unique and captivating way.