A taxing part (5)
![Ross](/clue/static/ross-mug.min.png)
I believe the answer is:
tithe
'part' is the definition.
(I have seen 'Tenth part' mean 'tithe' so perhaps 'part' could also mean 'tithe')
I cannot understand how the remainder of the clue works.
Can you help me to learn more?
(Other definitions for tithe that I've seen before include "10% tax" , "Impost" , "Tenth part once paid as tax" , "Charge" , "Tenth part paid to a church" .)