Form of language proclaiming wrong levy? (6)
I believe the answer is:
syntax
'form' is the definition.
(thesaurus)
I don't understand how the rest of the clue works.
Can you help me to learn more?
(Other definitions for syntax that I've seen before include "Rules governing formation of words into sentences etc" , "Rules governing formation of sentences and phrases" , "The rules governing words arrangements" , "The rules governing the arranging of words" , "branch of linguistics" .)