Word before "sauce" or "milk" (3)
I believe the answer is:
soy
'word before sauce or milk' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for soy that I've seen before include "Piquant eastern sauce" , "Dark salty sauce" , "Chinese sauce" , "Oriental sauce" , "Sauce bean" .)