Supermodel Campbell (4)
'supermodel campbell' is the definition.
(I've seen this in another clue)
This is all the clue.
(Other definitions for naomi that I've seen before include "- - Campbell, supermodel" , "Ruth's mother-in-law (OT)" , "Biblical mother-in-law of Ruth" , "woman's name" , "Mother-in-law of Ruth (Bible)" .)