Rules for conduct given quiet respect somehow (8)
I believe the answer is:
precepts
'rules for conduct' is the definition.
'quiet respect somehow' is the wordplay.
'quiet' becomes 'p' (music symbol for 'piano'**).
'somehow' indicates anagramming the letters.
'respect' with letters rearranged gives 'recepts'.
'p'+'recepts'='PRECEPTS'
'given' is the link.
(Other definitions for precepts that I've seen before include "General rules of behaviour - local authority taxes" , "Principles, commandments" .)