Possible Clues:

• O, that' sit
• O, that's how it should end
• The digit O
• Poetically nothing
• Name should mean nothing
• The North should make nothing at all of this
• Seems the North should get around to this
• O, is that what the North should get?
• What no thug, or the North, should come to, may be expressed by 10 across
• O, the North should be like this