Inquiry-based learning is becoming a widely recognized and used pedagogical approach. However, existing research has largely focused on inquiry learning in science education, neglecting fields such as social studies (SS). In Singapore, inquiry learning in SS received an impetus when a component called "Issue Investigation" (II) was introduced into the compulsory secondary school syllabus of 2016. Given the recency of this introduction, there has been a lacuna of empirical research. Addressing both these research gaps, this paper presents qualitative findings from a preliminary study of Singapore secondary school SS teachers' perspectives and experiences relating to II. Building on a recognition of teacher agency and of the role teachers play in mediating curriculum and teaching/learning, this paper focuses on how teachers "interpret" the nature of inquiry learning in SS in the Singapore context. Findings suggest that teachers held broadly two conceptions of II: some saw it as aimed towards working out practical solutions to societal issues in the spirit of participative citizenship; others treated it akin to a social science inquiry process that fostered critical and analytical thinking. In addition, the challenges teachers encountered in implementing and enacting II, and their coping strategies are also briefly discussed.