Background: The medical registrar is a daunting role to take on for the first time. While studies have explored how preparedness can be improved through simulation, less has been written about how doctors learn to be registrars through clinical practice. Method: Doctors working as medical registrars were invited to participate in semi-structured interviews. The qualitative data collected underwent thematic analysis. Results: The clinical environment was considered fertile ground for transformative experiential learning, but opportunities for debriefing and guided reflection were rare. Participants felt they needed additional support from supervisors after difficult experiences and mistakes, but this support was not always forthcoming. Conclusion: Acute physicians involved in supervising new medical registrars must facilitate meaningful independent practice to encourage the next generation of medical generalists.