That much is known. An enclosure, in the archaeological sense, is typically a defined area bounded by an earthen bank, a ditch, a wall, or some combination of these, and such features appear across Ireland in contexts ranging from the early medieval period back through the Bronze Age and beyond. They might surround a settlement, a burial ground, a place of assembly, or an area of agricultural use. What Feenlea's enclosure actually represents, when it was built, and by whom, remains formally undocumented in any publicly available form.

The townland of Feenlea sits within a county whose landscape is exceptionally dense with archaeology, from the limestone pavements of the Burren, ridged with ancient field systems, to the ringforts and cashels scattered across its quieter interior parishes. Clare's enclosures vary enormously in character and date, and without further detail it is not possible to say whether Feenlea's example is a modest ringfort, a larger enclosure of ceremonial significance, or something else entirely. It has been recorded as a monument, which means it was observed and logged at some point during fieldwork, but the substance of what was found has not yet been made publicly available.

This is, in its own way, an honest reflection of how archaeological knowledge actually works. Sites are identified, mapped, and assigned a record number long before anyone has written up what they mean. Feenlea's enclosure exists in that intermediate state, noted but not yet narrated, a feature in the Clare countryside whose story is still waiting to be told in full.