Implement with a blade (3)
I believe the answer is:
oar
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">implement with a blade</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for oar that I've seen before include "Sweep" , "Rowing boat operator" , "Propelling blade" , "propellor" , "Rower's flat blade" .)