Crossword Genius

The branch of metaphysics that deals with the nature of existence (8)

Ross

I believe the answer is:

ontology

'the branch of metaphysics that deals with the nature of existence' is the definition.
(I've seen this before)

This is the entire clue.

(Other definitions for ontology that I've seen before include "Area of metaphysics" , "Branch of metaphysics that deals with the nature of existence" .)

I've seen this clue in The Irish Times.
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