Taxi passenger (4)
I believe the answer is:
fare
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">taxi passenger</span>' is the definition.<br/ ><span class="explanation-format__explanation">(fare can mean someone paying a taxi fare)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for fare that I've seen before include "Charge for travelling on train or bus" , "Price of passage" , "diet" , "Commons" , "Paying passenger" .)