Substitute-Clock properly starting

[splitveer]

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!