Sour liquid accepted on a recipe? (6)
I believe the answer is:
alegar
'sour liquid' is the definition.
(I've seen this in another clue)
I don't understand the remainder of the clue.
Can you help me to learn more?
(Other definitions for alegar that I've seen before include "Sour beer" , "Sour stuff" , "Malt vinegar" .)