Cereal twisted in the air (3)
I believe the answer is:
rye
'cereal' is the definition.
(rye is a kind of cereal)
I don't understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for rye that I've seen before include "Whiskey (US)" , "Drink" , "Whiskey ingredient" , "Wheat-like cereal plant" , "Grass; whisky" .)