In a notably positive manner! (4)

I believe the answer is:

ably

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

'in a notably positive manner' is the definition.
I can't tell whether this definition defines the answer.

'in a notably positive' is the wordplay.
'in' indicates a hidden word.
'ABLY' is hidden in the letters of 'notably positive'.

Can you help me to learn more?

(Other definitions for ably that I've seen before include "In a competent fashion" , "In capable manner" , "In proficient manner" , "Competently" , "With competence" .)

I've seen this clue in the Evening Standard.

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