Possible Clues:

• English poet, Edith d. 1964
• Dame Edith --, poet
• Osbert, Sacheverell and Edith were members of this literary family
• 'I Live Under a Black Sun', a novel by Edith --
• Desirable quality in grand name of literary siblings
• Be agreeable
• English poet (Edith, Osbert or Sacheverell)
• Poet to look good?
• The poems set to music in William Walton’s Facade were from a collection of the same name by Edith ____
• Literary family have comfortable seat