Coflein describes it thus.
Site Description:
Three orthostats c.1.0m high define a rectangular chamber 2.4m by 1.5m. The partly displaced capstone is 2.0m by 1.6m and 0.9m thick. The chamber has been filled with field clearance stones. There is no trace of a mound or cairn.
Sounds alot like the picture of Whitehouse burial chamber further west, with luck I shall take a look shortly