I'm pritty sure the clockport is a standard port on the A1200 and I think you might want to save that for a sleek internal soundcard perhaps? If you know how to progrma and stuff you could use the other half of the clockport (that usually don't have any pins) and whire the thing up to that?
I don't have any progging experience on the Amiga though, so I couldn't tell if it would be an easy way. But it should be as easy as hooking the thing up to the other half of the clockport that's often used for other hardware.
