Narcissistic, say, drugged in a coma, half-naked (11)

I believe the answer is:

egomaniacal

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'narcissistic' is the definition.
Both the answer and definition are adjectives.
Perhaps they are linked in a way I don't understand?

'say drugged in a coma half-naked' is the wordplay.
'say' becomes 'eg' (both can mean for example).
'drugged' indicates an anagram.
'half-naked' becomes 'al' (I can't justify this - if you can you should believe this answer much more).
'in'+'a'+'coma'='inacoma'
'inacoma' with letters rearranged gives 'omaniac'.
'eg'+'omaniac'+'al'='EGOMANIACAL'

Can you help me to learn more?

(Another definition for egomaniacal that I've seen is " excessively selfish".)

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

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