Dowsing tool (3)
I believe the answer is:
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">dowsing tool</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 rod that I've seen before include "axle" , "Stick, symbol of punishment" , "Long, straight stick" , "A few yards" , "- - , pole or perch" .)