Displease greatly by spoiling a green (6)

I believe the answer is:

enrage

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

'displease greatly' is the definition.
I can't tell whether this defines the answer.

'spoiling a green' is the wordplay.
'spoiling' indicates anagramming the letters.
'a'+'green'='agreen'
'agreen' anagrammed gives 'ENRAGE'.

'by' is the link.

Can you help me to learn more?

(Other definitions for enrage that I've seen before include "Infuriate, make very angry" , "Make violently angry" , "Drive to anger" , "Make wild" , "Genera (anag.)" .)

I've seen this clue in the Evening Standard.

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