Duty applied to offence reportedly getting order of sentence (6)
I believe the answer is:
syntax
'order of sentence' is the definition.
'syntax' can be an answer for 'order' (I have seen 'Verbal order' mean 'syntax' so perhaps 'order' could also mean 'syntax'). I'm not sure about the 'of sentence' bit.
'duty applied to offence reportedly' is the wordplay.
'duty' becomes 'tax' (I've seen this before).
'applied to' is a charade indicator (letters next to each other).
'offence' becomes 'sin' (a sin is an offence or transgression).
'reportedly' shows a homophone (sound like).
'sin' is a homophone of 'syn'.
'tax' after 'syn' is 'SYNTAX'.
'getting' acts as a link.
Can you help me to learn more?
(Other definitions for syntax that I've seen before include "The rules governing the arrangement of words in sentences etc" , "Way in which words are arranged to form sentences" , "Linguistic study" , "branch of linguistics" , "Sentence structure" .)