Puzzles clues

1. Lunch and supper.
2. A clock.
3. A bottle                         
4. An egg.
5. Because seven eight nine (seven ate nine)
6. "y" (Why?")
7. W (Double u- Double you)
8. Because the B is after it.  
9. Because it's in the middle of the day.
10. "The C"                        
11. "The Q. (queue)
12. A horse and its rider.      
13. The horse's shadow.