Block for hammering (5)
I believe the answer is:
anvil
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">block for hammering</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for anvil that I've seen before include "Verdi chorus from Il Trovatore" , "Block on which metals are hammered" , "hard block" , "part of the ear" , "Heavy metal block in forge" .)