Tolerance of light opera (8)
I believe the answer is:
patience
'tolerance' is the definition.
(patience can mean tolerance or endurance)
I cannot understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for patience that I've seen before include "there's no one else to play this game" , "Calm endurance as in card game for one" , "Quality of endurance in operetta" , "Waiting without complaint" , "likely to be lost by the hot-tempered" .)