On air broadcast has split account of the priesthood (7)
I believe the answer is:
aaronic
'on' is the definition.
Both the answer and definition are adjectives.
Perhaps you can see a link between them that I don't see?
I don't understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for aaronic that I've seen before include "Priestly" , "For clerical work" .)