Here are the possible solutions for of a tune instantly appealing and memorable clue
Answer
Clue
Relevancy
catchy
Clue
(Of a tune) instantly appealing and memorable
Definition
pleasing and easily remembered
baconpancakes
Clue
All-in-one breakfast foods popularized by a song from "Adventure Time" (having it instantly get stuck in your head will be your punishment for cheating and Googling it)