Cereal ran into disputed goal (7)
I believe the answer is:
granola
'cereal' is the definition.
(I know that granola is a type of cold cereal)
'ran into disputed goal' is the wordplay.
'into' means one lot of letters goes inside another.
'disputed' indicates an anagram.
'goal' with letters rearranged gives 'gola'.
'ran' going within 'gola' is 'GRANOLA'.
(Other definitions for granola that I've seen before include "US breakfast cereal" , "type of cereal" , "breakfast dish" .)