Move on wheels (4)
I believe the answer is:
roll
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">move on wheels</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for roll that I've seen before include "At school it may be called" , "Small round piece of bread" , "Swell" , "one filled at lunchtime, perhaps" , "Schedule" .)