28a. British king is one of eight walking upstairs (7) ----A-D.
9d. Alcoholic drink in one cask knocked over (4) NIP-.
17d. Dreamtimes construed as real, enthralling children (8) ALC---AS.
15d. A gentleman rising in a sect, supporter of autocrat (9) -AE-A-I-T.
21d. Ivy is adult following religious instruction (6) HE--RA.
17d.Alcheras
www.thefreedictionary.com/Alchera (Non-European Myth & Legend) another name for Dreamtime1 Also called: alchera. [from a native Australian language, literally: dream time]