Food eight spat out (9)
I believe the answer is:
spaghetti
'food' is the definition.
(spaghetti is a kind of food)
'eight spat out' is the wordplay.
'out' indicates anagramming the letters (out can mean wrong or inaccurate).
'eight'+'spat'='eightspat'
'eightspat' is an anagram of 'SPAGHETTI'.
(Other definitions for spaghetti that I've seen before include "Strange tight peas for the Italian dish" , "Strings of pastas" , "Past eight (anag.)" , "Pasta made from tight peas" , "A dish from the gas-pit" .)