CLAS-GARMON, a township, in the parish of ST-HARMON, hundred of RHAIADR, county of RADNOR, SOUTH WALES, 5 miles (N.) from Rhaiadr, containing, with the township of Bwnneiaid, 428 inhabitants. It forms the north-western portion of the parish, which borders on Montgomeryshire. Two roads from Rhaiadr to Llanidloes pass through it, one along the left bank of the Wye, and the other, the more direct, after crossing the Mertyd brook, through the mountainous part of it. Clis hill is an extensive and bleak elevation in this township, chiefly appropriated in depasturing sheep.