Srila Prabhupada: Kanistha-adhikari means he must be a brahmana. That is kanistha-adhikari. The spiritual life, kanistha-adhikari, means he must be a qualified brahmana. That is kanistha. What is esteemed as very high position in the material world, brahmana, that is kanistha-adhikari.
(Srila A.C. Bhaktivedanta Swami Prabhupada. 770214r2.may - 14th February 1977. Mayapur, India.)

...sometimes, and quite wrongly, the kanistha adhikari is looked down upon in a condescending manner. Here Srila Prabhupad clearly defines what is the basics for a kanistha adhikari.