Transfer rolling stock from track to track (5)
I believe the answer is:
shunt
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">transfer rolling stock from track to track</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 shunt that I've seen before include "Car crash (slang)" , "Move wagons around" , "Push, electrical conductor" , "Type of road accident" , "Bypass" .)