oleo (9)
![Ross](/clue/static/ross-mug.min.png)
I believe the answer is:
margarine
'oleo' is the definition.
(synonyms)
This is the entire clue.
(Other definitions for margarine that I've seen before include "Fat-based butter substitute" , "Is Ma angrier at this spread?" , "F [FAT]" , "Item of food" , "Substitute spread for butter" .)