I left Nice after ten years of hedonism (9)
I believe the answer is:
decadence
'hedonism' is the definition.
Both the answer and definition are singular nouns.
Maybe you can see an association between them that I can't see?
'i left nice after ten years' is the wordplay.
'left' suggests deleting specific letters.
'after' is a charade indicator (letters next to each other).
'ten years' becomes 'decade' (a decade is ten years).
'nice' with 'i' removed is 'nce'.
'nce' after 'decade' is 'DECADENCE'.
'of' is the link.
Can you help me to learn more?
(Other definitions for decadence that I've seen before include "Decline in quality" , "State of immorality and self-indulgence" , "Corruption" , "Moral or cultural decline" , "Immoral behaviour" .)