Society incorporated by popular SA president himself (2,6)
I believe the answer is:
in person
'himself' is the definition.
(getting something in person is getting it yourself)
'society incorporated by popular sa president' is the wordplay.
'society' becomes 's' (common abbreviation in names of organisations).
'incorporated by' means one lot of letters goes inside another.
'popular' becomes 'in' (something that's 'in' is fashionable).
'sa president' becomes 'Peron' (Juan Peron, former president of Argentina).
'in'+'peron'='inperon'
's' put into 'inperon' is 'IN-PERSON'.
(Other definitions for in person that I've seen before include "Somebody fashionable" , "Actually present" , "Not remotely" , "not sending someone else as representative" , "Ron's pine (anag) - being bodily present" .)