Crossword Genius

An attractively lively state (13)

Ross

I believe the answer is:

vivaciousness

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

'an attractively lively state' is the definition.
The definition suggests a singular noun which matches the answer.

'lively state' is the wordplay.
I cannot quite see how this works, but
'lively' could be 'vivacious' (similar in meaning) and 'vivacious' is found within the answer.
The remaining letters 'ness' is a valid word which might be clued in a way I don't understand.
This may be the basis of the clue (or it may be nonsense).

Can you help me to learn more?

I've seen this clue in The Irish News.
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