Worship of false gods (8)
I believe the answer is:
idolatry
'worship of false gods' is the definition.
(I've seen this before)
This is the entire clue.
(Other definitions for idolatry that I've seen before include "bowing down before a goddess?" , "Adulation" , "Adroitly (anag.)" , "reverence" , "Graven image worship" .)