Gilbertian virtue (8)

I believe the answer is:

patience

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'virtue' is the definition.
(I know that patience is a virtue)

I cannot understand how the rest of the clue works.

(Other definitions for patience that I've seen before include "Musical work" , "Game, tolerance of delay" , "restraint" , "Calm endurance as in card game for one" , "Solo card game, played with equanimity" .)

I've seen this clue in The Globe and Mail.

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