Getting a clock out to a pin in PSOC 4 -
http://www.cypress.com/?rID=80799 Using clocks as data PSOC 4
As far as PWM clock, right click the clock, its datasheet has APIs to set divider ratio.
Controlling a PWM with the input clock might not be ideal. Better would be to set the PWM's period value. When a constant duty-cycle is needed, the compare value has to be changed as well. Driving the PWM with a comparable high system clock will give you a broad range of output frequency.