I need some help with deciding what species of tree to plant. It's in a
Sydney garden, with mostly a clay soil. It's on the north side wall of a
house, but the spot mostly gets sun in the afternoon. The garden area is
about 1.8m deep, 3.5m wide (I guess two trees would be an option), and
ideally the tree will grow to around 3.5m. I'd like an Australian native,
and preferably deciduous. It will hopefully give some privacy with it's
foliage.

Can anyone help me out with suggestions?

thanks,
Wally