If fellows consume half a loaf, it's edible! (5)
I believe the answer is:
melon
'edible' is the definition.
The answer and definition can be both things that one consumes for nourishment as well as being singular nouns.
Maybe you can see an association between them that I don't see?
I cannot understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for melon that I've seen before include "Fruit of the gourd family with a hard rind and juicy flesh" , "Killing" , "Gourdlike fruit" , "Type of pepo" , "Member of the gourd family" .)