AN EXTRA THOU
Credit: LA Times Crossword
Sylvia Bursztyn and Barry Tunick  (adapted)

1. What does a dog have to do before it can practice law?
2. What do you call a kitchen fixture that came with the house?
3. Why are dogs good at keeping appointments?
4. What did the fashionista wear when she used the ATM?
5. What do you call Captain Kirk's no-frills spacecraft?
6. Why does the NRA oppose efforts to recycle used oil?

Answers:

1. Pass the Bark
2. Original sink
3. They mark their calendars.
4. A pink number
5. The Starkship Enterprise 
6. The NRA opposes gunk control.

NOTE: In the title to this puzzle, THOU is short for THOUSAND (K).