Stuck on two. 12d Alloy used in the making of scientific instruments and clocks. (5) -N-A-. 50a Leather strap passing under a horse's dock to prevent a saddle or harness from slipping (7) C-U-P-R....
36A A continuously-burning fire or a town-hall like building in an ancient Greek city centre (9) ?R?T?N?U? 43D Latin word meaning power (8) I?F?R?U? 45D Section of a bobbindriver (7) ?A?T?I? Any help...