Possible Clues:

• Bigot - enthusiast
• I'm tremendously keen to dissipate fat and I can!
• More than enthusiastic
• Fervid follower
• No moderate way to have a revolver over the attic, by the sound of it
• Zealous devotee
• Over-enthusiastic person
• Zealot or extremist
• Person filled with excessive zeal for cause
• Cool to take an unconscious jerk's anorak