Extremely forceful, possibly not evil (7)

I believe the answer is:

violent

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'extremely forceful' is the definition.
'violent' can be an answer for 'forceful' (I've seen this before). I'm not certain of the 'extremely' bit.

'possibly not evil' is the wordplay.
'possibly' indicates an anagram.
'not'+'evil'='notevil'
'notevil' with letters rearranged gives 'VIOLENT'.

Can you help me to learn more?

(Other definitions for violent that I've seen before include "Tending to use intimidatory force" , "Using excessive force" , "Using much force" , "Brutal - intense" , "Intensely forcible" .)

I've seen this clue in The Irish Independent.

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