Possible Clues:

• Horrible name - a pig-pen
• Spiteful and unkind
• Thoroughly unpleasant, as weather
• Meanspirited
• Like inclement weather
• No way included that's unpleasant
• Not at all pleasant, this Janet Jackson offering
• 13 across is even less like the unpleasant northern place
• Unpleasant way to block contrary vote
• No way you can see inside grave