22d ?E?G?E island; (final E from reverie). I can't find it either - veggie springs to mind knowing Oz and vegemite !
I have 1a as jugation, so 3d T?I?S?I; another unsolved.
Also 13a A kept mistress of a man of society (4-8) ???I ?I?D?I?E
18a The making of Beau Nash (13) D???I?I?ATION
6d Superiors’ written instructions to subordinates (10) O???I???ES
Thanks Cruciformist and roslyn for 13a demi mondaine; I did have 8d wrong - should be troparion not trisagion. Thanks too for 18a and 6d. Just the Dionysus 3d to solve now