Possible Clues:

• Gertrude Stein seems to have written his autobiography
• Here Comes -, writes Joyce of H. C. Earwicker
• All and sundry
• All persons
• European association involves absolutely all the people
• ... With 103A, for mama's boys?
• With 43-across, The Main Ingredient's soy curd refrain?
• They are all offering sea view alternatively with right of way on the outskirts for soulmate
• All except learner drove by Ely erratically
• They sang for Sassoon