Is there anyway to connect more than one one device to the clockport of the A1200 ?
Yes.
RMB Digitaltechnik once sold the "Quadroport", a device that connects to the clockport (via a ribbon cable IIRC) and provides four clockports.
Note that RBM left the Amiga market ages ago - I don't think they are still able to supply such a device. Good luck locating it on ebay
