AimsTo systematically explore the clinical supervision (CS) experience for nurses transitioning to advanced practice.DesignA qualitative systematic review using Joanna Briggs Institute meta‐aggregation following an a priori protocol published on PROSPERO (CRD42023426658).Data SourcesQualitative studies obtained from Medline, CINAHL, PsycINFO, Scopus, Emcare and ERIC databases and ProQuest dissertations and theses for peer‐reviewed, published and unpublished studies from inception to July 2023.Review MethodsTwo authors conducted data screening and abstraction. Quality was appraised using the Critical Appraisal Skills Programme tool and reporting followed the Enhancing Transparency in Reporting the Synthesis of Qualitative Research checklist for systematic reviews.ResultsSixteen studies contributed to five synthesized findings: CS that is beneficial requires structure and commitment, trusting relationships are foundational for learning, lifting burdens and preventing burnout, learning through reflection, critical thinking and feedback and barriers to CS.ConclusionsThis review provides a meaningful exploration of CS to support nurses transitioning to advanced practice. Well‐structured supervision offers a safe space to share work‐related concerns and develop an advanced practitioner identity. Sharing experiences helps alleviate work‐related burdens and reduce professional isolation and burnout.Implications for the ProfessionPeer‐support networks are vital for successful transition to advanced practice.ImpactThis review highlighted the impact of effective supervisory relationships in forming professional identity and possible links with nursing retention.Public ContributionNo direct patient contributions are included as it forms part of a research degree.