### Clue: Ambassador and bishop's address in 20 (4)
### Answer: HERR 
 ### Explanation: Definition: address in 20
 HE(abbrev. for "His Excellency", title for an ambassador) **plus**(and) RR(abbrev. for The "Right Reverend", title for a bishop).
Defn: A term of address for a man from Munich(answer to 20 down).