Broadcasting artiste becomes more sensationally attractive (7)
I believe the answer is:
tastier
'more sensationally attractive' is the definition.
'broadcasting artiste' is the wordplay.
'broadcasting' is an anagram indicator.
'artiste' with letters rearranged gives 'TASTIER'.
'becomes' is the link.
(Other definitions for tastier that I've seen before include "More appetising" , "More flavoursome" , "Having a more pleasant flavour" , "More palatable" , "More attractive" .)