Possible Clues:

• Playwright had 'is 'n' 'er mixed up
• Cast mostly delivered almost any playwright
• Nicollette of "Desperate Housewives"
• Author of The Rivals
• Comic writer's novel managed to skirt round primitive urges
• Read his novel, then new Irish writer
• Playwright from Dublin having adventure novel to deliver, and incomplete
• Writer's novel published without name
• After vacation in Scarborough, grim up north admits a dramatist
• One in small group, an author