Don't know if this is any good, but it hints at the ideas you are looking for.
The general use of the clarinet as a virtuoso solo instrument came much later than that of its woodwind companions, the flute and the oboe. The composers of the Mannheim school were the first to use it in orchestras, and they also composed the first concertos for the instrument. As well as this group, Mozart chose the clarinet as a solo instrument, not only in some of his symphonies and wind divertimentos but also for two chamber works and one concerto. He was inspired in this by his dissolute friend, Anton Stadler, the famous 18th century clarinet virtuoso. After his wonderful clarinet quintet and before the Requiem, two months before his death, he completed the Stadler Rondo, the last movement of the clarinet concerto written for his friend. This was his last instrumental work.
Every movement of the clarinet concerto makes characteristic use of the clarinet's inherent solo potential. Indeed, almost throughout the opening movement the leading role is taken by the clarinet either playing the dolce, an agile accompaniment or virtuoso cadenzas. The opening subject of the Adagio in humn-like and intimate, setting the tone for the whole movement. At the same time in its somewhat resigned melodies of the festive, sage world of Sarastro it is reminiscent of the Magic Flute. The third movement reminds one of the colourful rondo finales of the earlier Vienese piano concertos. Here, Mozart also exploits the vast possibilities of contrast between the solo - the concertino - and the full orchestra, even in the cariations of the lilting 6/8 rondo theme. The galliard like dance, the monore siciliano melodies and the rhythmic folk dance type *landler* are united into a glorious whole, in the same way as the singing and lyrical, tespestuous and framatic, playful and opera buffa sections. As well as being the companion piece to Mozart's last piano concertos and quintets the clarinet concerto sets an example for a whole era in this field of composition.