Blasted meatloaf finally going brown (7)
I believe the answer is:
oatmeal
'brown' is the definition.
(oatmeal can mean a brown colour)
'blasted meatloaf finally going' is the wordplay.
'blasted' indicates an anagram.
'finally going' means to remove the last letter (the final letter is removed).
'meatloaf' with its last letter taken away is 'meatloa'.
'meatloa' is an anagram of 'OATMEAL'.
(Other definitions for oatmeal that I've seen before include "Ground grain used to make porridge" , "Pale variegated brown colour" , "Plain food" , "Basis of porridge" , "Kind of porridge" .)