Indian leader heading off without energy (6)
I believe the answer is:
gandhi
'indian leader' is the definition.
(I've seen this before)
I can't explain the remainder of the clue.
Can you help me to learn more?
(Other definitions for gandhi that I've seen before include "Famous Indian politician" , "Indian nationalist and spiritual leader" , "Indira, Rajiv or Sonia" , "Indian spinner" , "Peacemaker" .)