Crossword Genius

Come again possible like the self-centred one (9)

Ross

I believe the answer is:

egomaniac

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

'the self-centred one' is the definition.
Although both the answer and definition are singular nouns, I can't understand how they can define each other.

'come again possible' is the wordplay.
'come again' anagrams to 'EGOMANIAC'.
But, I am unsure how the anagram is indicated.

'like' is the link.

Can you help me to learn more?

(Other definitions for egomaniac that I've seen before include "who's full of himself" , "Self-obsessed person" , "he thinks "it's all about ME"" , "Excessively self-absorbed person" , "Bighead" .)

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