Possible Clues:

• You'd expect a bit more after this from a raven
• Not with sugar on top may it be seen
• That's more what you'd expect to be 6 across by a raven
• Half a fictional land
• Into obscene verse? Certainly not!
• 'When hell freezes over'
• ''When donkeys fly!''
• Quoted by the raven? There's more to it
• More what you'd expect from ravin' quotations
• Absolute refusal comes near to defining womankind