In anger, I judge (5)

I believe the answer is:

irate

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

'in anger i judge' is the definition.
I can't tell whether this definition defines the answer.

'i judge' is the wordplay.
'judge' becomes 'rate' (rating is a kind of judging).
'i'+'rate'='IRATE'

Can you help me to learn more?

(Other definitions for irate that I've seen before include "I tear away, being annoyed" , "Hacked off" , "Full of 22" , "Livid" , "Annoyed, irritated" .)

I've seen this clue in the Evening Standard.

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