Mattock (7)
I believe the answer is:
pickaxe
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">mattock</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for pickaxe that I've seen before include "strike-breaker?" , "Mattock" , "it's needed to break new ground" , "Wooden-handled iron tool with a curved head, pointed at both ends" , "Ground-breaking tool" .)