He's a card, performing parlour game (8)
I believe the answer is:
charades
'parlour game' is the definition.
'charades' can be an answer for 'game' (charades is a kind of game). I am unsure of the 'parlour' bit.
'he's a card performing' is the wordplay.
'performing' indicates anagramming the letters (the letters move around or 'perform').
'hes'+'a'+'card'='hesacard'
'hesacard' is an anagram of 'CHARADES'.
Can you help me to learn more?
(Other definitions for charades that I've seen before include "Games like this" , "Game in which answers are acted out" , "Party guessing game" , "Miming games" , "Guessing game where words are acted out" .)