A goat-head pumpkin? (9)
I believe the answer is:
butternut
'pumpkin?' is the definition.
The answer and definition can be both things that one consumes for nourishment as well as being singular nouns.
Maybe there's an association between them I don't understand?
'a goat-head' is the wordplay.
'a goat' becomes 'butter' (something which 'butts').
'head' becomes 'nut' (informal term for somebody's head).
'butter'+'nut'='BUTTERNUT'
Can you help me to learn more?
(Other definitions for butternut that I've seen before include "species of tree" , "Wood" , "Variety of pumpkin" , "sort of a squash" .)