Cut out for duty (6)
I believe the answer is:
excise
This clue is a double definition.
'cut out' is the first definition.
(excise can mean to cut out or remove)
'for duty' is the second definition.
(both can mean a tax)
(Other definitions for excise that I've seen before include "A tax to be cut out, perhaps" , "Expunge the tax?" , "Type of tax" , "Customs" , "that wretches hatefully collect" .)