Fourth (7)
I believe the answer is:
quarter
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">fourth</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I know that fourth can be written as quarter)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for quarter that I've seen before include "Fractional mercy towards opponent?" , "See 17 Across" , "Twenty-five cents" , "Fourth; mercy" , "Area of town; mercy" .)