Crossword Genius

A joker maybe, but angry (4)

Ross

I believe the answer is:

wild

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

'angry' is the definition.
(I know that angry can be written as wild)

I cannot understand how the remainder of the clue works.

Can you help me to learn more?

(Other definitions for wild that I've seen before include "Unrestrained" , "Savage" , "Not domesticated" , "Feral - crazy" , "Impulsive" .)

I've seen this clue in the Evening Standard.
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