Tax article after it's imported (5)
I believe the answer is:
tithe
'tax' is the definition.
(historical tax paid to the church)
'article after it's imported' is the wordplay.
'article' becomes 'the' (the definite article in English).
'after' means one lot of letters go next to another.
'it' becomes ''t' (abbreviation. e.g. in 'tis).
'imported' becomes 'i' (this might be a standard abbreviation which I don't know about).
't'+'i'='ti'
'the' after 'ti' is 'TITHE'.
Can you help me to learn more?
(Other definitions for tithe that I've seen before include "Levy, originally worth one tenth" , "Former church tax" , "Impost" , "Source of church revenue" , "10% tax" .)