Cyclist (5)
I believe the answer is:
rider
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">cyclist</span>' is the definition.<br/ ><span class="explanation-format__explanation">(someone riding a bike)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for rider that I've seen before include "H. - Haggard, English novelist (She, etc)" , "Horseman or add-on verdict by jury" , "Horseman or addendum" , "Motorcyclist" , "One in the saddle" .)