Gardening machine (5)
I believe the answer is:
mower
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">gardening machine</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 mower that I've seen before include "Grass cutter" , "Machine for cutting grass" , "Grass-cutter" , "Lawn cutter" , "Tool for cutting grass" .)