Accountant discontented with announced percentage of income taken by government charges (7)
I believe the answer is:
attacks
'charges' is the definition.
(charge can mean to attack)
'accountant discontented with announced percentage' is the wordplay.
'discontented' means to remove the middle letters (the word's contents are removed).
'with' says to put letters next to each other.
'announced percentage' becomes 'tacks' (I can't justify this - if you can you should give a lot more credence to this answer).
'accountant' with its centre taken out is 'at'.
'at'+'tacks'='ATTACKS'
'of income taken by government' acts as a link.
I am not very happy about this link. Some or all of it may belong to another bit of the clue.
Can you help me to learn more?
(Other definitions for attacks that I've seen before include "Launches assault or criticism" , "Fiercely criticises" , "Assails" , "Invades" , "Charges" .)