sitar player vs instrumentalist

sitar player and instrumentalist both are nouns.

Word	Noun	Adjective	Verb	Adverb
sitar player	Yes	No	No	No
instrumentalist	Yes	No	No	No

As nouns, instrumentalist is a hypernym of sitar player; that is, instrumentalist is a word with a broader meaning than sitar player:

Other hypernyms of sitar player include musician, player.

sitar player (noun)	instrumentalist (noun)
a musician who plays the sitar	someone who plays a music as a profession