Way to absorb God - Sam worships regularly (7)
I believe the answer is:
osmosis
'way to absorb' is the definition.
(chemical process of absorption)
'god sam worships regularly' is the wordplay.
'regularly' indicates alternate letters (regularly take one letter, leave next etc.).
'god'+'sam'+'worships'='godsamworships'
The alternate letters of 'godsamworships' are 'OSMOSIS'.
(Other definitions for osmosis that I've seen before include "Something like dialysis" , "Process of learning something gradually and without effort" , "Process of gradual absorption" , "Absorption (biol.)" , "Diffusion of liquid through porous membrane" .)