Two-wheeled transport (7)
I believe the answer is:
bicycle
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">two-wheeled transport</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 bicycle that I've seen before include "Two-wheeled vehicle" , "One's pushed to make progress" , "Personal transport" , "Tour de France racer?" , "A tandem is a . . . . . . . nade for two" .)