A faction accepting political leader's viewpoint (6)
I believe the answer is:
aspect
'viewpoint' is the definition.
(I've seen this before)
'a faction accepting political leader's' is the wordplay.
'faction' becomes 'sect' ('sect' can be a synonym of 'faction'**).
'accepting' is an insertion indicator.
'leader's' suggests taking the first letters (I've seen 'leaders' mean this).
The initial letter of 'political' is 'p'.
'sect' placed around 'p' is 'spect'.
'a'+'spect'='ASPECT'
(Other definitions for aspect that I've seen before include "View, panorama" , "Distinct part or element" , "Demeanour" , "Manner" , "Face" .)