Reason will only send the midi clock one thing. But with a little help from a couple free programs you can send the clock to more than one external devices.
Windows:
loopMIDI: https://www.tobias-erichsen.de/softwa...
Midiox: http://midiox.com/
Mac:
Midipipe: http://www.subtlesoft.square7.net/Mid...
Some of my music projects:
https://hypnosandsons.bandcamp.com/re...
https://alansmitheeorchestra.bandcamp...