Smith trashed Sinatra (7)
I believe the answer is:
artisan
'smith' is the definition.
(both can mean a skilled worker)
'trashed sinatra' is the wordplay.
'trashed' is an anagram indicator (I've seen this in other clues).
'sinatra' with letters rearranged gives 'ARTISAN'.
(Other definitions for artisan that I've seen before include "Crafty sort" , "Skilled manual 17" , "Train as (anag) - craftsman" , "Egypt peninsula; holy Mount" , "Journeyman" .)