Reportedly throw social group (5)
I believe the answer is:
caste
'social group' is the definition.
(I've seen this in another clue)
'reportedly throw' is the wordplay.
'reportedly' indicates a 'sounds like' (homophone) clue.
'throw' becomes 'cast' (casting is a kind of throwing).
'cast' sounds like 'CASTE'.
(Other definitions for caste that I've seen before include "Large, long-necked, wading bird" , "Hereditary social class in Hindu society" , "Religious or social class" , "Hindu social rank" , "Persons with class" .)