Very grateful for all help with these three clues please.
8dn: "Possessed by evil spirit, I'm deprived of power in part of Switzerland (10)." I have D-M---N-O-.
10dn: "Hack's article upset editor, I believe, initially (5)." I have A-I--.
18ac: "Extremists banned from meeting held by this French woman (9)." I have --T---I-E.