Crossword Genius

Angry, getting one’s dander up somewhat? (3)

Ross

I believe the answer is:

red

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

'angry' is the definition.
(I've seen this in other clues)

'getting one's dander up somewhat?' is the wordplay.
I cannot quite understand how this works, but
'getting' could be 're' (I've seen this in other clues) and 're' is present in the answer.
A single letter 'd' remains which might be clued in a way I don't understand.
This explanation may well be incorrect...

Can you help me to learn more?

(Other definitions for red that I've seen before include "Colour for danger" , "Crimson" , "Colour of 1 across" , "Colour for a blusher" , "Blushing" .)

I've seen this clue in the Evening Standard.
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