Smithy (5)
I believe the answer is:
forge
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">smithy</span>' is the definition.<br/ ><span class="explanation-format__explanation">(synonyms)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for forge that I've seen before include "Shape by heating and hammering, as smith does" , "Blacksmith's workshop" , "1 across" , "Create by hammering" , "Fabricate" .)