Possible Clues:

• Writer Welty
• Author Welty
• Pulitzer winner Welty
• Pulitzer prizewinner Welty
• Novelist Welty
• "Delta Wedding" author Welty
• Welty who wrote "The Optimist's Daughter"
• "The Optimist's Daughter" novelist Welty
• "The Optimist's Daughter" Pulitzer winner Welty
• Name on the cover of 'The Optimist's Daughter'