Crossword Genius

Stop mad bishop getting into barrel for Easter tradition (3,5,3)

Ross

I believe the answer is:

hot cross bun

I'm a little stuck... Click here to teach me more about this clue!

'easter tradition' is the definition.
Although both the answer and definition are singular nouns, I cannot understand how they can define each other.

'stop mad bishop getting into barrel' is the wordplay.
I cannot really understand how this works, but
'mad' could be 'cross' (both can mean angry) and 'cross' is present in the answer.
'bishop' could be 'b' (abbreviation for bishop in chess) and 'b' is located in the answer.
'barrel' could be 'tun' (tun is a kind of barrel) and 'tun' is located in the leftover letters.
The remaining letters 'ho' is a valid word which might be clued in a way I don't see.
This may be the basis of the clue (or it may be nonsense).

'for' is the link.

Can you help me to learn more?

(Other definitions for hot cross bun that I've seen before include "Food for Good Friday" , "seasonal treat" , "Symbolic food item" , "Easter treat" , "Teacake-like baked confection" .)

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