Burning anew to read the New Testament (6)
I believe the answer is:
ardent
'burning' is the definition.
(both can mean passionate)
'anew to read the new testament' is the wordplay.
'anew' indicates an anagram.
'the new testament' becomes 'nt'.
'read' with letters rearranged gives 'arde'.
'arde'+'nt'='ARDENT'
(Other definitions for ardent that I've seen before include "Enthusiastic, eager" , "Burning with emotion" , "passion" , "Fervid" , "Passionate and glowing" .)