Centre card (5)
I believe the answer is:
heart
I believe this is a double definition.
'centre' is the first definition.
(I know that centre can be written as heart)
'card' is the second definition.
(the hearts are a playing card suit)
(Other definitions for heart that I've seen before include "Kernel" , "one in suit" , "Decorated (cake)" , "one needs to beat" , "Central part" .)