Forbearance, tolerance (8)
I believe the answer is:
patience
I believe this clue is a double definition.
'forbearance' is the first definition.
(I know that forbearance can be written as patience)
'tolerance' is the second definition.
(patience can mean tolerance or endurance)
(Other definitions for patience that I've seen before include "Card game for one player" , "Calm endurance as in card game for one" , "Unhurried quality or solo card game" , "there's no one else to play this game" , "'Forbearance, tolerance (8)'" .)