A British queen said to be good religious leader (6)
I believe the answer is:
abbess
'religious leader' is the definition.
(I've seen this before)
'a british queen' is the wordplay.
'british' becomes 'b' (abbreviation e.g. in BBC).
'queen' becomes 'bess' (nickname for Elizabeth I).
'a'+'b'+'bess'='ABBESS'
'said to be good' is the link.
I am not very happy about this link. Some or all of it may be part of another bit of the clue.
Can you help me to learn more?
(Other definitions for abbess that I've seen before include "Head of convent" , "She heads a religious community" , "Nuns' leader" , "Female superior" , "Religious leader" .)