Regurgitated food next to queen, finding bun filling (6)
I believe the answer is:
burger
'regurgitated food next to queen' is the definition.
I can't judge whether this defines the answer.
'bun filling' is the wordplay.
'bun' becomes 'hamburger bun' (hamburger bun is a kind of bun).
'filling' indicates the central letters (the letters which fill the word).
The central letters of 'hamburgerbun' are 'BURGER'.
'finding' acts as a link.
Can you help me to learn more?
(Other definitions for burger that I've seen before include "Fast food item" , "Flat disc of meat in a bun" , "Meat in a bun (colloq.)" , "Incongruously varied" , "Fried cake of minced beef served in a bun" .)