This article discusses the implementation of closures in Tcl, highlighting the challenges due to the language's design. Unlike C++ and Python, Tcl doesn't have built-in closures. The author implemented a system using namespaces and a `lexenv` method to mimic closure behavior, allowing for variable capture and persistence outside their initial scope. While the implementation achieves a similar outcome to closures in other languages, it relies on manual management of namespaces and variable bindings, and currently requires a manual `destroy` call until a future Tcl update. The article also contrasts this with the C++ approach, noting the copying of the environment rather than true closure capture.