What you find inside pleases you (8)
I believe the answer is:
contents
'you' is the definition.
Both the definition and answer are singular nouns.
Perhaps they are linked in a way I don't understand?
I don't understand the remainder of the clue.
Can you help me to learn more?
(Other definitions for contents that I've seen before include "Things inside" , "List of what's included" , "All that's contained" , "Makes satisfied - with ingredients?" , "What's inside" .)