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

1. Detonators
2. Pram
3. Baseball practice facilities
4. Zaire, once
5. Emotional wreck
6. Monetary carte blanche
7. Roquefort relative
8. Raspberry
9. Custodian's area
10. Red and white cell numbers
11. Tasty fried food coating
12. Operatic singing style

Answers:

1. Blasting caps
2. Baby carriage
3. Batting cages
4. Belgian Congo
5. Basket case
6. Blank check
7. Blue cheese
8. Bronx cheer
9. Broom closet
10. Blood count
11. Bread crumbs
12. Bel canto

Credit: LA Times Crossword
Sylvia Bursztyn and Barry Tunick
B. C. THINGS  (#1-8)