Howdy! There are a bunch of active duty clinical psych students at USU. With the MD students who were in ROTC in college, the service obligation from ROTC is just added to what they owe for the MD. West Pointers for instance, hold a 12 year service obligation (5 for the Point and 7 for USU) after graduating from USU (disregarding residency). Though I can't truly speak from experience within the clinical psych PhD program, I can't imagine why it would be any different. Good luck on your application trail!