No earthwork rises from the ground, no bank or ditch interrupts the grass, no stone suggests that anything was ever here. The only reason anyone knows to look is that a cartographer, working on the Ordnance Survey's six-inch mapping project in 1841, thought it worth recording: a subcircular enclosure, roughly twenty metres across at its widest point, oriented roughly northeast to southwest.

Enclosures of this kind, usually circular or near-circular ringworks defined by an earthen bank and internal ditch, are among the most common monument types in the Irish countryside. They served various purposes across many centuries, from enclosed farmsteads of the early medieval period to boundary features of much older or later date. The Clonduff example is modest in scale, twenty metres being toward the smaller end of the range, suggesting a single-family or small agricultural use rather than anything more elaborate. By the time the nineteenth-century surveyors came through, the feature was presumably still legible enough in the landscape to be mapped, even if only faintly. Whatever remained above ground then has since been lost entirely, ploughed out, eroded, or simply subsumed into the working fields around it.

What survives is therefore cartographic rather than physical: a mark on an old map indicating that something once stood here, and the knowledge that the ground beneath the surface of Clonduff may still hold traces of whoever built and used this small enclosure, even if those traces are invisible from above.