Tenth part (5)
I believe the answer is:
tithe
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">tenth part</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 tithe that I've seen before include "Tenth (of one's earnings)" , "Former church tax" , "Levy of one tenth of something" , "Source of church revenue" , "One-tenth; church tax" .)