Crossword Genius

I have a discussion about a kind of tree (7)

Ross

I believe the answer is:

conifer

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

'tree' is the definition.
(conifer is a kind of tree)

'i have a discussion about a kind' is the wordplay.
I cannot quite understand how this works, but
'i' is present in the answer.
'about' could be 'on' (as in a book 'on' a certain topic) and 'on' is found in the answer.
This may be the basis of clue (or it may be nonsense).

'of' is the link.

Can you help me to learn more?

(Other definitions for conifer that I've seen before include "In force (anag.)" , "Fir or pine, for example" , "Evergreen (generally)" , "Evergreen tree" , "The tree doesn't lose its leaves" .)

I've seen this clue in The Globe and Mail.
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