Aboriginal weapon (9)
I believe the answer is:
boomerang
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">aboriginal weapon</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 boomerang that I've seen before include "Australian throwing stick" , "Curved throwing stick" , "Backfire" , ""It keeps coming back"" , "Aboriginal projectile" .)