Forbearance (8)
There are a few possibilities for this:
tolerance
'forbearance' is the definition.
(I know that forbearance can be written as patience)
This is all the clue.
(Other definitions for patience that I've seen before include "Card game for one player" , "G & S' alternative for "Bunthorne''s Bride"" , "Work by G&S" , "likely to be lost by the hot-tempered" , "Musical work" .)
(Other definitions for stoicism that I've seen before include "Uncomplaining fortitude" , "Endurance of hardship without complaint" , "Impassivity, patience" , "Ability to bear hardship without complaining" , "Behaviour enduring hardship" .)
'forbearance' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for tolerance that I've seen before include "Allowable variation (in size)" , "Patience, forbearance" , "Indulgence" , "Willingness to accept the behaviour of others" , "broad-mindedness" .)