Firm supporter beginning to cover new law (8)
I believe the answer is:
stalwart
'firm supporter' is the definition.
'stalwart' can be an answer for 'supporter' (stalwart is a kind of supporter). I am not sure about the 'firm' bit.
'beginning to cover new law' is the wordplay.
'beginning' becomes 'start' (start is a kind of beginning).
'to cover' means one lot of letters goes inside another.
'new' is an anagram indicator.
'law' anagrammed gives 'lwa'.
'start' placed around 'lwa' is 'STALWART'.
Can you help me to learn more?
(Other definitions for stalwart that I've seen before include "Strong and reliable" , "Resolute and firm" , "Normally reliable" , "Dependable figure" , "Tart laws could be strong and sturdy" .)