Performer playing sitar with extremely trite accompaniment (7)
I believe the answer is:
artiste
'performer' is the definition.
(artiste is a kind of performer)
'playing sitar with extremely trite accompaniment' is the wordplay.
'playing' indicates an anagram.
'with extremely trite accompaniment' becomes 'te' (I can't explain this - if you can you should give a lot more credence to this answer).
'sitar' anagrammed gives 'artis'.
'artis'+'te'='ARTISTE'
Can you help me to learn more?
(Other definitions for artiste that I've seen before include "nightclub entertainer?" , "professional dancer?" , "A sitter for creative person" , "Tears it (anag.)" , "Attires like entertainer" .)