The answers to the clues below will have something in common.

1. It may contain a blurb and/or critical praise
2. Relationships with kin
3. Old fuddy-duddy
4. Disguise the truth with superficial lies
5. Wise guy
6. You don't want one. But if you have one, you don't want to lose it.

Answers:

1. Book jacket
2. Family ties
3. Stuffed shirt
4. Sugarcoat
5. Smarty pants
6. Law suit - - - - - - items of clothing 

Credit:
Ray Hamel (#1-2)