Broadcast month's seed (5)
I believe the answer is:
maize
'broadcast month's seed' is the definition.
The answer and definition can be both plants as well as being singular nouns.
Maybe there's an association between them I don't understand?
This is all the clue.
Can you help me to learn more?
(Other definitions for maize that I've seen before include "Cereal grass producing corncobs" , "Tall cereal plant bearing grain on large pods" , "- maybe staple" , "Something cultivated" , "Source of oil" .)