23D Uniformly grey, they cried: 'Blue Murder!' (4) R _ B _
18A Good will be joined after a short seasonal appearance from the past. (1-3,6) _ - _ _ S SPIRIT
59A Mess with Margot, would you - and she playing alongside superman? (6) _ I _ D _ R
70D If only by half, this is the end. (3) _ I _
Many thanks. It's a horrible crossword, full of sloppy clues, but if you're not in, you can't win...