A Roman Catholic woman — one using a bow (6)
I believe the answer is:
archer
'a bow' is the definition.
(I've seen this before)
'a roman catholic woman' is the wordplay.
'roman catholic' becomes 'RC' (abbreviation for Roman Catholic).
'woman' becomes 'her' (her refers to a woman).
'a'+'rc'+'her'='ARCHER'
'one using' acts as a link.
This may not be right. Some or all of it may be part of another bit of the clue.
Can you help me to learn more?
(Other definitions for archer that I've seen before include "Arrows one sends" , "was more roguish" , "One uses a bow and arrow" , "Bowman - popular author" , "Her car is targeted by one with a bow and arrow" .)