Physician-scientist generally has time split between lab and clinic and the split might be 80-20 or 90-10 depending on one's funding.
Physician-scientists are generally a subset of physicians in academic medicine. When we say "academic medicine" we mean that you are on the payroll of a medical school or the med school's affiliated clinical entity rather than being in a for-profit group practice, working for a non-med school affiliated hospital, or having a solo office (very rare these days). Many physicians in academic medicine are paid almost exclusively out of money they bring in through clinical care of patients. They may have some money coming in for work done with research participants (if the reason for the visit is protocol driven, it may not be covered by insurance and therefore the study sponsor - often big pharma- will pay something equivalent given that time you would otherwise spend treating patients is being used to collect data from a research participant who may also be your patient). Some physicians in academic medicine have small research grants and some have some salary support for administrative tasks related to education (assessing medical students in a clerkship) or the department more broadly (e.g. budgets, space, and hiring of new members of the department). Most are also expected to do what the medical school considers "good citizenship" by participating without compensation in committee work or being engaged in interviewing candidates for med school, residency or fellowship, or spending a dozen hours per year in the classroom or at the bedside as a small group leader.
