The virtue of a solo game (8)
I believe the answer is:
patience
This might be a double definition.
'the virtue' is the first definition.
(I have seen 'The virtue' mean 'patience' so perhaps 'virtue' could also mean 'patience')
'solo game' is the second definition.
'patience' can be an answer for 'game' (patience is a kind of game). I am unsure of the 'solo' bit.
'of a' is the link.
Can you help me to learn more?
(Other definitions for patience that I've seen before include "Virtue - solitaire" , "that one plays" , "Unhurried quality or solo card game" , "Work by G&S" , "Card game for one player" .)