Crossword Genius

Succeed in quiz about cancelled or difficult subjects (4,6)

Ross

I believe the answer is:

sore points

I'm a little stuck... Click here to teach me more about this clue!

'cancelled or difficult subjects' is the definition.
I know nothing about this answer so I can't judge whether it can be defined by this definition.

'succeed in quiz about' is the wordplay.
I cannot quite see how this works, but
'in' is found in the answer.
'about' could be 're' (regarding) and 're' is found within the answer.
This explanation may well be incorrect...

Can you help me to learn more?

I've seen this clue in The Independent.
Want a hint initially instead of a full solution? Install my app