Possible Clues:

• Old cat, losing it, turned man-eater
• Canvasser going to hold back seriously unpleasant type
• Ugly type of growth needing no publicity
• Trespasser goes climbing, carrying this unpleasant specimen
• Giant roses scattered round top of garden
• Crone's cousin
• Fiona, in the "Shrek" films
• Female fairy-tale baddie
• Giant ship offering female monster
• Grendel's mother, e.g.