Possible Clues:

• Even parts of 1984, one must add, a number regarded as ominous
• Coven count
• A baker's dozen
• Either 17- or 57-Across
• Here it isn't out of place (is to be written out)!
• Neither temperature would get you in here, in two ways -- that is unfortunate
• Prime time and neither's broadcast
• Half of what's left is unlucky for some
• Unlucky in what's so thin about the tree in bits
• What Cinderella turned into after twelve