did fine until the last 4 interconnecting clues 22 across something sweet obtained with a shilling at Greyfriars ??E?R?; 24 ac I'm producing a dodgy answer sometimes after a second G???S?N?; 25 ac. Ern, a gent oddly cremated? wrong twice over in this charnel house ?E?E?T ?A???N; 13 down (to which the former all contribute) Charlotte's teacher with a whip in school oddly erred S?A?????? I have googled, consulted wikepedia, and various dictionaries to no avail and I am at my wits end - HELP