The electric clarinetist is an alter-ego of Squidward who pretends he is in a band in the episode "Sold!"
He is similar to Squidward but wears a brown, curly wig with a blue bandana coming across and a bun on top, with a pink scarf. He also wears a yellow top and holds his electric clarinet, which has a speaker coming out of it.
Role in episode
When Squidward pretends a musical band lives under Patrick's rock, he says the electric clarinet is one part of his band. Patrick says that there is no such thing, so Squidward hastily makes one, shows it to Patrick, and then proceess to play it.