Hairy thing to eat? (3)
I believe the answer is:
bun
'hairy thing' is the definition.
Although both the answer and definition are singular nouns, I cannot see how one could define the other.
I don't understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for bun that I've seen before include "Small rounded bread or cake" , "Something from Bath or Chelsea" , "Small cake; hair style" , "Hairstyle, cake" , "Small cake - tied-up hair" .)