Amount of money curtailed enjoyment (3)
I believe the answer is:
fun
'enjoyment' is the definition.
(I've seen this before)
I don't understand the rest of the clue.
Can you help me to learn more?
(Other definitions for fun that I've seen before include "Playful amusement" , "Enjoyment" , "Light-hearted pleasure" , "'Merriment, playfulness (3)'" , "entertainment" .)