Fewest points admitted by imam in imamate (6)
I believe the answer is:
minima
'fewest points' is the definition.
(plural of 'minimum')
'admitted by imam in imamate' is the wordplay.
'admitted by' indicates the answer is hidden within the clue.
'MINIMA' is hidden within 'imam in imamate'.
(Other definitions for minima that I've seen before include "Smallest possible amounts" , "Lowest quantity or amount" , "Lowest possible amounts" , "Least quantities" , "lot of extremely low points" .)