A chronic portent, sadly, regarding homo sapiens as essential? (15)

I believe the answer is:

anthropocentric

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

'regarding homo sapiens as essential?' is the definition.
I can't judge whether this definition defines the answer.

'a chronic portent sadly' is the wordplay.
'sadly' indicates anagramming the letters.
'chronic'+'portent'='chronicportent'
'chronicportent' with letters rearranged gives 'nthropocentric'.
'a'+'nthropocentric'='ANTHROPOCENTRIC'

Can you help me to learn more?

(Another definition for anthropocentric that I've seen is " Revolving around mankind".)

I've seen this clue in The Independent.

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