A taxi (3)
I believe the answer is:
cab
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">a taxi</span>' is the definition.<br/ ><span class="explanation-format__explanation">(synonyms)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for cab that I've seen before include "'The authority collects money made from crime, initially (3)'" , "It has the authority to confiscate the proceeds of crime, in short" , "info for citizens provided here" , "Hackney" , "Taxi to hold an engine-driver" .)