Product of a tree that needs cooking? Yes and no (5)
I believe the answer is:
eater
'product of a tree that needs cooking? yes and no' is the definition.
Although both the answer and definition are singular nouns, I don't see how one could define the other.
'product of a tree' is the wordplay.
'product of' indicates an anagram.
'a'+'tree'='atree'
'atree' anagrammed gives 'EATER'.
Can you help me to learn more?
(Other definitions for eater that I've seen before include "type of fruit" , "Person taking course" , "Consumer of food" , "Consumer at table" , "diner" .)