Follow a strange god (3)
I believe the answer is:
dog
'follow' is the definition.
(dog can mean to follow or torment)
'a strange god' is the wordplay.
'a strange' indicates anagramming the letters.
'god' is an anagram of 'DOG'.
(Other definitions for dog that I've seen before include "Shadow" , "Domestic animal" , "'You cannot teach an old ... new tricks'" , "Domesticated canine" , "'Every . . . has its day'" .)