On board, it gives duchesses heart (5)
I believe the answer is:
chess
'on board it' is the definition.
I can't tell whether this definition defines the answer.
'duchesses heart' is the wordplay.
'heart' says to take the centre.
The centre of 'duchesses' is 'CHESS'.
'gives' acts as a link.
Can you help me to learn more?
(Other definitions for chess that I've seen before include "Benny Andersson and Bjorn Ulvaeus musical" , "Game involving mates" , "Musical - board game" , "A game of skill" , "Sixteen-men-a-side game" .)