They may be wild or rolled (4)
I believe the answer is:
oats
'they may be wild or rolled' is the definition.
(I've seen this in another clue)
This is the entire clue.
(Other definitions for oats that I've seen before include "Wild ones are sown in youthful excess" , "Hardy cereals eaten by horses" , "A cereal crop" , "Cereal food for horses" , "Edible grass seeds" .)