Crossword Genius

Fundraiser set up over there involving an O’Connor, say (3,4,3)

Ross

I believe the answer is:

red nose day

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

'fundraiser' is the definition.
(fundraiser organised by Comic Relief)

I can't explain the rest of the clue.

Can you help me to learn more?

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