Intelligence attracts me, Alexa - opus is fantastic (11)

I believe the answer is:

sapiosexual

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

'intelligence attracts me' is the definition.
I can't judge whether this defines the answer.

'alexa opus is fantastic' is the wordplay.
'fantastic' indicates an anagram.
'alexa'+'opus'+'is'='alexaopusis'
'alexaopusis' anagrammed gives 'SAPIOSEXUAL'.

Can you help me to learn more?

I've seen this clue in The Independent.

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