Blacksmith's workshop (5)
I believe the answer is:
forge
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">blacksmith's workshop</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 forge that I've seen before include "Ironworks" , "Shape by heating and hammering, as smith does" , "Smith's workplace" , "Counterfeit - smithy" , "Blacksmith's premises" .)