Possible Clues:

• One abstaining from worldly comforts
• Cites, perhaps, in account of person living austerely
• Person who leads a severely simple life
• A doubter losing heart becomes reclusive
• This abstainer might be sort of acid about the South
• A changed sect in charge of yogi
• One practising self-denial
• Having sat with ice for about a century, that's a cold sort of person
• Self-denying, not allowing oneself luxuries
• Person who lives severely simple life