Might one see it, angrily, when arrested? (3)

I believe the answer is:

red

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'might' is the definition.
The definition and answer can be both human attributes as well as being singular nouns.
Perhaps they are linked in a way I don't understand?

I don't understand how the remainder of the clue works.

Can you help me to learn more?

(Other definitions for red that I've seen before include "Bloodshot" , "Type of wine" , "Colour of 1 across" , "14 -- breed of 4" , "socialist?" .)

I've seen this clue in the Evening Standard.

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