Possible Clues:

• Unofficial anthem sung especially at Murrayfield
• Blossom beginning to fall down
• For example, rose water, perhaps?
• Start to float down river?
• Lily, for one
• Shannon Lee?
• The dove's-foot crane's-bill, for instance
• Man bandaging cuts, his wares often thorny?
• With 50-Down, place that this puzzle grid represents
• River — plant