To elaborate on Fitzcoraldo’s comment that “There is one large stone that may be earthfast and a number of other stones”... at this second collection of stones that are seemingly in alignment with the standing stones, beside the large elongated stone layn in the ground, one of those other stones, though small, much smaller than the other stnding stones, is actually steadfast in the ground and standing.
Also, the OS map associates ‘The Hag’ with something in this area, though I can’t tell what.