It means getting more bread that’s flatter, not soft (5)
I believe the answer is:
raise
'it means getting more bread that's flatter not soft' is the definition.
The definition suggests a singular noun which matches the answer.
This is the entire clue.
Can you help me to learn more?
(Other definitions for raise that I've seen before include "jack up" , "Produce" , "rally" , "Make greater" , "Pick up" .)