Fruit centre (4)
I believe the answer is:
core
This might be a double definition.
'fruit' is the first definition.
The answer and definition can be both man-made objects as well as being singular nouns.
Maybe they are linked in a way I don't understand?
'centre' is the second definition.
(core can mean something's centre)
Can you help me to learn more?
(Other definitions for core that I've seen before include "Inner part" , "Central part of the Earth" , "Heal" , "Drilled rock sample" , "Planet's centre" .)