Code of behaviour (6)
'code of behaviour' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for ethics that I've seen before include "Codes or principles for professional people" , "Code of behaviour" , "Science of moral principles" , "Codes of behaviour for professional people" , "Professional codes of behaviour.18 Serious or heartfelt" .)
'code of behaviour' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for protocol that I've seen before include "Procedure or system of rules" , "Poor clot involved in kind of status etiquette" , "Diplomatic etiquette or procedure" , "rules of behaviour" , "customs" .)