Profane clause rewritten right (7)
I believe the answer is:
secular
'profane' is the definition.
(I know that profane can be written as secular)
'clause rewritten right' is the wordplay.
'rewritten' indicates anagramming the letters.
'right' becomes 'r' (abbreviation).
'clause' with letters rearranged gives 'secula'.
'secula'+'r'='SECULAR'
(Other definitions for secular that I've seen before include "Not spiritual" , "Non-church" , "Lay" , "Not religious or sacred" , "without religion" .)