Resolute from the beginning, making a case for the new law (8)
I believe the answer is:
stalwart
'resolute' is the definition.
(similar in meaning)
'beginning making a case for the new law' is the wordplay.
'beginning making' becomes 'start' (I can't justify this - if you can you should believe this answer much more).
'a case for' is an insertion indicator.
'the new' is an anagram indicator.
'law' with letters rearranged gives 'lwa'.
'start' going around 'lwa' is 'STALWART'.
'from the' acts as a link.
Can you help me to learn more?
(Other definitions for stalwart that I've seen before include "stout" , "Staunchly faithful" , "One you can rely on" , "Normally reliable" , "Loyal servant" .)