Sash for some of the nobility (3)
I believe the answer is:
obi
'sash' is the definition.
(type of Japanese sash or belt)
'some of the nobility' is the wordplay.
'some of' says the answer is hidden in the clue.
'OBI' is hidden within 'nobility'.
'for' is the link.
(Other definitions for obi that I've seen before include "__-Wan Kenobi of "Star Wars" - kimono sash" , "Long cloth" , "Sash worn on Japanese kimono" , "Broad sash worn with a kimono" , "Kimono accessory" .)