After decades of discussion about clinical supervision and mental health nursing, the reality is that many acute mental health inpatient settings continue to struggle with the notion of clinical supervision and the implementation process. In this article we delineate the key elements of clinical supervision, explore practical and dynamic difficulties associated with clinical supervision and question whether too much is being asked of this one process, especially in acute inpatient settings. For many mental health nurses, existing practices offer many of the purported benefits of clinical supervision. Ultimately, unless clinical supervision is better understood and implemented effectively, it is unlikely to meet expectations. Clinical supervision should ultimately be defined by the nurses participating in it. This article contributes to current discussions regarding the purpose of clinical supervision, the realities of its implementation, and in particular considers the role of clinical supervision relative to existing professional support opportunities. © 2010 Informa Healthcare USA, Inc.