Excavator (6)
I believe the answer is:
digger
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">excavator</span>' is the definition.<br/ ><span class="explanation-format__explanation">(synonyms)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for digger that I've seen before include "Miner" , "Informal Australian using spade?" , "site machine" , "Informal Aussie with spade?" , "Australian; gardener" .)