1) Addict 2) An enthusiastic follower 3) Drug addict 4) Junky 5) Metafictional novel 6) Rabid devotee 7) Slang for a drug addict Found on https://www.crosswordclues.com/clue/junkie
a drug addict, esp. one addicted to heroin. · a person with an insatiable craving for something: a chocolate junkie. · an enthusiastic follower; fan; devotee: a baseball junkie. Found on https://www.infoplease.com/dictionary/junkie