The most common and most likely answer to this crossword clue is the 6 letter word INJERA
I
N
J
E
R
A
Buddy explains!
The straight part
We know that "Bread from flour made sOurer" is the straight/definition part of the clue. The straight part is often a synonym or definition, in this case bread from flour made sourer = injera.The cryptic/wordplay part
In cryptic crossword there's often an wordplay/cryptic part as well.This part involves a more complex hint, such as an anagram, homophone, hidden word, etc.
Sadly, We don't have an explanation for this specific crossword clue yet.
What does INJERA mean?
INJERA noun- A pancake-like flat bread made from fermented teff flour, a traditional food of Eritrea, Ethiopia, Somalia, Yemen, and the Nuer people of Sudan.