A young corporation? (5)
I believe the answer is:
tummy
This might be a double definition.
'a young' is the first definition.
Although both the answer and definition are singular nouns, I can't see how one could define the other.
'corporation?' is the second definition.
('tummy' can be a synonym of 'corporation')
Can you help me to learn more?
(Other definitions for tummy that I've seen before include "middle" , "Stomach (informal)" , "Stomach (colloq.)" , "Stomach, abdomen" , "Belly" .)