### Clue: Area noble rules, proper, accepting respectable party I overlooked (9)
### Answer: PRINCEDOM 
 ### Explanation: Definition: Area noble rules
 PRIM(proper;very formal and correct) **containing**(accepting) "nice"(respectable;refined in language, manners, etc, as in "nice people don't do that!") + "do"(a party;a social function) **minus**(… overlooked) "I".