Possible Clues:

• Customary dreadlock wearer
• Cult member reads atlas regularly
• Cult follower
• Jamaican cultist
• In short, the cult gets the gratitude of the Academician (5)
• One with dreads?
• The gratitude of the artist might get far with Ian
• Emperor stands over a Jamaican
• A celebrity's last to come to the fore as a religious believer
• Dreadhead?