Lively -- as seances, supposedly? (8)

I believe the answer is:

spirited

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'lively' is the definition.
('spirited' can be similar in meaning to 'lively')

I don't understand how the remainder of the clue works.

Can you help me to learn more?

(Other definitions for spirited that I've seen before include "Full of energy and enthusiasm" , "with brio" , "Sparkling" , "Energetic, animated" , "Full of beans" .)

I've seen this clue in The Telegraph.

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