Although music education scholars have increasingly advised teachers to take heed of values, principles, and strategies of musical practices outside of school, very little has been written in music education regarding the ideological underpinnings of musical practices in these contexts. This article argues that musical practices outside of school do not necessarily provide ideal models to be directly applied in the music classroom, but need to be critically examined and transformed to better align with global imperatives such as inclusiveness. In addressing the imbalance between "inauthentic" learning in school and "authentic" learning outside of school, this article shows how working toward the global ideal of gender inclusion may require radical activism and a cosmopolitan approach countering the right of an ethnic group to practice and preserve their own distinctive culture. The life story of a Newar musician from the Kathmandu Valley is used to illustrate this argument by demonstrating what it takes for a "culture-bearer" to initiate radical processes of social change and transformation. In this qualitative narrative case study, we asked what kind of context-specific, socio-cultural negotiation was required to overcome the challenges the musician faced in including girls and women in musical learning in a Newar community.