Announced wrong charge for structure of sentence? (6)
I believe the answer is:
syntax
'structure of sentence?' is the definition.
(syntax is how sentences are structured)
'announced wrong charge' is the wordplay.
'announced' indicates a 'sounds like' (homophone) clue.
'wrong' becomes 'sin' (I've seen this before).
'charge' becomes 'tax' (tax is a kind of charge).
'sin' sounds like 'syn'.
'syn'+'tax'='SYNTAX'
'for' is the link.
(Other definitions for syntax that I've seen before include "Grammatical arrangement of words" , "The rules governing the arrangement of words in sentences etc" , "Grammatical rules" , "Rules governing formation of sentences and phrases" , "Verbal order" .)