After a great start with this, I've got stuck -any help would be welcome.
1 A. Old resident of Indian Ocean island port's hot (8) m?la???h
(I thought of 'malagash' - but I don't think that has anything to do with the Indian ocean.)
6 D. Pear-tree cultivated,say,two thirds in a different form (8) r?t?at?r
NB. This is a themed crossword. The preamble mentions 'in nine cells[adjacent or diagonally adjacent] cells clash. These clashes must be resolved appropriately...)
I don't know if these two clues are affected by this.