Type of music initially captivating a king with eastern bun (4,4)
I believe the answer is:
rock cake
'eastern bun' is the definition.
The definition and answer can be both things that one consumes for nourishment as well as being singular nouns.
Perhaps they are linked in a way I don't understand?
'type of music initially captivating a king' is the wordplay.
'type of music' becomes 'rock' (I've seen this in another clue).
'initially' is a charade indicator (letters next to each other) (some letters go before others).
'captivating a king' becomes 'cake' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'rock'+'cake'='ROCK-CAKE'
'with' acts as a link.
Can you help me to learn more?
(Other definitions for rock cake that I've seen before include "Rough-looking hard bun" , "Baked tooth-breaker?" .)