Most primates together in LA spread dogma regularly (6)
I believe the answer is:
apedom
'most primates together' is the definition.
(apes collectively)
'la spread dogma regularly' is the wordplay.
'regularly' means one should take alternating letters (regularly take one letter, leave next etc.).
'la'+'spread'+'dogma'='laspreaddogma'
The alternating letters of 'laspreaddogma' are 'APEDOM'.
'in' is the link.
(Other definitions for apedom that I've seen before include "class of swingers?" , "condition of primates" , "Where primates are found" .)