Furious, I rebuke (5)

I believe the answer is:

irate

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

'furious' is the definition.
(I know that furious can be written as irate)

'i rebuke' is the wordplay.
'rebuke' becomes 'rate' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'i'+'rate'='IRATE'

Can you help me to learn more?

(Other definitions for irate that I've seen before include "Hacked off" , "Angry and incensed" , "Spitting feathers" , "Magical rod" , "A tier (anag)" .)

I've seen this clue in the Evening Standard.

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