Card game we hear (5)
I believe the answer is:
heart
'card' is the definition.
(the hearts are a playing card suit)
I can't explain the remainder of the clue.
Can you help me to learn more?
(Other definitions for heart that I've seen before include "Core; organ" , "Centre; valour" , "Body organ" , "It beats" , "It's in the chest" .)