Propeller (3)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">propeller</span>' is the definition.<br/ ><span class="explanation-format__explanation">(an oar helps propel a boat)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for oar that I've seen before include "It ends in blade" , "Propelling blade" , "Rowing implement" , "Manual boat propeller" , "Rower" .)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">propeller</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I know that screw is a type of propeller)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for screw that I've seen before include "Fastener with a tapered threaded shank" , "wages" , "Metal fastener" , "Fastener; propeller" , "shaft" .)