What might stop any angry type seeing red? (6,9)

I believe the answer is:

colour blindness

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

'seeing red?' is the definition.
The definition and answer can be both states of affairs as well as being singular nouns.
Perhaps they are linked in a way I don't understand?

I can't explain the rest of the clue.

Can you help me to learn more?

I've seen this clue in The Times and The Sunday Times.

Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free. Check out my app or learn more about the Crossword Genius project.