Former church tax (5)
I believe the answer is:
tithe
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">former church tax</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for tithe that I've seen before include "Tenth part - old tax" , "financial contribution" , "One-tenth of income paid to church" , "Offering" , "church funding" .)