Crossword Genius

A city hairstyle, or something to eat (4,3)

Ross

I believe the answer is:

bath bun

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

'something to eat' is the definition.
I can't tell whether this definition defines the answer.

'a city hairstyle' is the wordplay.
'a city' becomes 'bath' (I've seen this before).
'hairstyle' becomes 'bun'.
'bath'+'bun'='BATH BUN'

'or' is the link.

Can you help me to learn more?

(Other definitions for bath bun that I've seen before include "Rich, sweet little cake" , "Small cake with spices and fruit" , "Sweet spicy confection" .)

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