One gradually stripped during a party game (6)
I believe the answer is:
parcel
'game' is the definition.
The definition and answer can be both acts as well as being singular nouns.
Maybe you can see an association between them that I can't see?
I don't understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for parcel that I've seen before include "Package; piece of land" , "Package wrapped in paper" , "One conveyed" , "Packet" , "Wrapped missive" .)