Cardinal Richelieu, at heart, a good man (4)
I believe the answer is:
east
'man' is the definition.
The answer and definition can be both locations as well as being singular nouns.
Perhaps there's a link between them I don't understand?
'cardinal richelieu at heart a good' is the wordplay.
'cardinal richelieu' becomes 'e' (I can't explain this - if you can you should believe this answer much more).
'at heart' says to take the centre.
'a good' becomes 'tasty' (I've seen this in another clue).
The centre of 'tasty' is 'ast'.
'e'+'ast'='EAST'
Can you help me to learn more?
(Other definitions for east that I've seen before include "Compass bearing" , "Where the sun rises" , "Player in deal" , "bridge-player" , "English region" .)