Endless source of childish pleasure? (4)
I believe the answer is:
hoop
'endless source of childish pleasure?' is the definition.
I can't judge whether this defines the answer.
'endless source of childish pleasure?' is the wordplay.
'endless' means to remove the last letter.
'source' becomes 'hog' (I have seen 'source of meat' mean 'hog' so perhaps 'source' could also mean 'hog').
'of' becomes 'o''.
'childish pleasure?' becomes 'p' (I can't justify this - if you can you should give a lot more credence to this answer).
'hog' with its final letter taken away is 'ho'.
'ho'+'o'+'p'='HOOP'
Can you help me to learn more?
(Other definitions for hoop that I've seen before include "Arch used in croquet" , "Rigid circular band" , "children's toy" , "Circle, ring" , "Circlet" .)