Possible Clues:

• Writer Trollope
• Man's name
• Man with hat on touring US city
• Suffragette Susan B
• Mark's retained hard modern spelling of his second name
• Dollar figure
• Saint who lent his name to a cross
• - van Dyck, seventeenth century Flemish painter
• Fellow worker given sweet substance, lacking energy
• With 18-across, patriarch whose fate is demonstrated in the bottom two rows of this grid