Rower's blade (3)
I believe the answer is:
oar
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">rower's blade</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for oar that I've seen before include "Manual boat propeller" , "Propelling pole" , "Use it to move a boat" , "Crewman" , "Sweep" .)