Promoted new diets and raved (10)
I believe the answer is:
advertised
'promoted' is the definition.
(I've seen this before)
'new diets and raved' is the wordplay.
'new' is an anagram indicator.
'and' says to put letters next to each other (I've seen this in other clues).
'diets' put after 'raved' is 'raveddiets'.
'raveddiets' is an anagram of 'ADVERTISED'.
(Other definitions for advertised that I've seen before include "Published" , "promoted" , "Publicised" .)