26 down, please. I had 'tempered steel' but that makes others wrong, so what is "alloy once used to make sword blades"? (8,5) **M*S*U*
Also 25 across: innermost sanctuary of an ancient Greek temple (6) ending in M. I know I know it but just can't catch it!
21 across: game in which alternate players take one or more objects from one of a number of piles and try not to havve the last object. (3) starting with N