Substitute-Clock properly starting
 

GV game. A1 has a throw in after a timeout. Team A has A6 at the table to sub but the clock hasn't properly started and she didn't check in before the warning horn for the timeout. We don't allow her to come in. On the throw in we have a violation for kicking the ball. Because the violation happens simultaneously with the touch of the ball is the clock properly started and can we let the sub in?

Thanks for the help!

The clock doesn't need to start for this (that's only to have a player RETURN to the game). Once the ball becomes live, the player can substitute the next time the ball becomes dead, and the clock is stopped (unless htere's multiple FTs involved).

Let's say the player is trying to return to the game. Can we let them in? At the timeout A2 was subbed for. Now A2 is back at the table trying to enter the game. Then the violation occurs. Can A2 enter into the game with the clock not properly started.

Bob answered both your scenarios in Post #2.

No, the player must wait in this case.