I've removed the clean-out valve, what do I need to do to get the tub to drain?

I've removed the clean-out valve, what do I need to do to get the tub to drain?
I hope by ":clean out valve" you meant the chrome overflow plate.
You must send a snake down the open hole left by the plate. (see image).
You'll hit a return bend, (the trap) about 18" down but once around that you only have 10 more feet to go. **OR** You could cover the overflow hole and try to remove the clog by plunging the drain,(see image) Good luck, tom

Thanks Tom, I tried this today and removed some of the hair from the trap. My snake is only 8' so it's still clogged. I'm looking for a longer snake at this moment.

Thanks.