Blacksmith's block (5)
I believe the answer is:
anvil
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">blacksmith's block</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for anvil that I've seen before include "Block on which metals are hammered" , "Block for metalworking" , "On which hot metal is shaped" , "It helps forger" , "part of the ear" .)