Game of Throne (3)
I believe the answer is:
loo
I believe this is a double definition.
'game' is the first definition.
(historic card game found in Jane Austen novels)
'throne' is the second definition.
(both can mean a toilet)
'of' is the link.
(Other definitions for loo that I've seen before include "Card-game" , "Toilet (informal)" , "bog" , "Card game; the 'smallest room'" , "Little boys' room" .)