Possible Clues:

• No way you can see inside grave
• "Eww!"
• 1986 Janet Jackson song
• Satanic
• Unpleasant way to block contrary vote
• A street in New York that’s not very nice
• 13 across is even less like the unpleasant northern place
• Not at all pleasant, this Janet Jackson offering
• No way included that's unpleasant
• Meanspirited