3 Down,Dashes what did for Sebastion(5)?A?T?
5 Down, Thinking people on St Pancras,say,suffering appropiate fate(9)
?????T???
17 Down,Arrange terrible agonies surrounding martyr's end (8) ??G???S?
20/22 Down, My goodness!There are none down here!(6,5) S?I??? ???V?