A cereal obtained from a tree? (5)
I believe the answer is:
acorn
'a tree?' is the definition.
The answer and definition can be both plants as well as being singular nouns.
Perhaps there's a link between them I don't understand?
'a cereal' is the wordplay.
'cereal' becomes 'corn' (corn is a kind of cereal).
'a'+'corn'='ACORN'
'obtained from' is the link.
Can you help me to learn more?
(Other definitions for acorn that I've seen before include "Might source" , "Dirt on a liquid surface" , "form of seeding" , "Potential oak" , "From which a mighty oak may grow?" .)