The experience section of the AMCAS application has a pull-down menu of categories of experiences. There are two volunteer categories: volunteer, clinical and volunteer, non-clinical. There are two categories of employment: employment, miliatry and employment, non-military. There is a category for teaching/tutoring that can overlap with employment, non-military or with volunteer/non-clinical so you can see that it is your call as to how you might categorize something that would fit into more than one category.... However "clinical experience" is not a category, it is either "volunteer, clinical" or some kind of employment or perhaps research with human subjects who are also patients.