But not afraid to be emphatic? (7)

I believe the answer is:

fearful

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'but not afraid' is the definition.
'fearful' can be an answer for 'afraid' (similar in meaning). I'm not certain of the 'but not' bit.

I don't understand the remainder of the clue.

Can you help me to learn more?

(Other definitions for fearful that I've seen before include "Frightened, apprehensive" , "Apprehensive, worried" , "awful!" , "Timid" , "Afraid; very great" .)

I've seen this clue in the Evening Standard.

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