Vitalise monster, making famous quote!? (3,5)

I believe the answer is:

its alive

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

'famous quote?' is the definition.
I know nothing about this answer so I cannot judge whether this works.

'vitalise monster' is the wordplay.
'vitalise' can be anagrammed to 'ITS ALIVE'.
Though, I'm not clear how this is indicated.

'making' acts as a link.

Can you help me to learn more?

I've seen this clue in the Sydney Morning Herald.

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