Moral principles of some banners (9)
I believe the answer is:
standards
This clue is a triple definition!
'moral' is the first definition.
(thesaurus)
'principles' is the second definition.
(I've seen this before)
'of' is a link.
'some banners' is the third definition.
(I've seen this in another clue)
(Other definitions for standards that I've seen before include "Flags; levels of quality" , "Required levels of quality" , "Benchmarks, norms (9)" , "Desired levels of quality" , "Reference points for comparison" .)