Step 2: Make your way to Clarinet.
Step 3: Speak to the Clarinet NPC He says, "My horn keeps clogging. Can you help me?"
Step 4: Travel to the beach and look near the rocks You will find the mouthpiece to Clarinet's horn.
Step 5: Return to Clarinet and speak to him He says, "Oh thank you! Here take this." as he hands you a clarinet that is yours to keep.