Confused, I go on to call about study of the nature of existence (11)

I believe the answer is:

ontological

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'study of the nature of existence' is the definition.
I can't judge whether this defines the answer.

'confused i go on to call' is the wordplay.
'confused' indicates an anagram.
'i'+'go'+'on'+'to'+'call'='igoontocall'
'igoontocall' anagrammed gives 'ONTOLOGICAL'.

'about' acts as a link.

Can you help me to learn more?

(Other definitions for ontological that I've seen before include "metaphysical" , "Like argument for God" .)

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

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