Inside a belly’s endlessly delicious fruit (7)
I believe the answer is:
apricot
'fruit' is the definition.
(type of fruit)
'inside a belly's endlessly delicious' is the wordplay.
'inside' means one lot of letters goes inside another.
'belly' becomes 'pot' (as in a pot belly).
'endlessly delicious' becomes 'ric' (I can't justify this - if you can you should believe this answer much more).
'a'+'pot'='apot'
'apot' going around 'ric' is 'APRICOT'.
Can you help me to learn more?
(Other definitions for apricot that I've seen before include "Small, peach-like fruit" , "shade" , "Juicy stone-fruit, orange-pink when ripe" , "Orange-yellow colour; fruit" , "Asian fruit" .)