Limits to growth set by one Indian leader (6)
I believe the answer is:
gandhi
'indian leader' is the definition.
(I've seen this before)
'limits to growth set by one' is the wordplay.
I cannot really understand how this works, but
'one' could be 'an' (I've seen this in other clues) and 'an' is found within the answer.
This explanation may well be incorrect...
(Other definitions for gandhi that I've seen before include "Indira, Rajiv or Sonia" , "Pacifist Indian leader" , "Spiritualistic Indian statesman" , "Famous Indian politician" , "Family name of Indian leaders" .)