Vegetable, we hear, that's scorched (7)
I believe the answer is:
charred
'that's scorched' is the definition.
('char' can be a synonym of 'scorch')
I don't understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for charred that I've seen before include "Blackened by fire" , "Slightly burnt" , "what's black on surface" , "Scorched and blackened" , "Partially burnt" .)