Doubter (8)
'doubter' is the definition.
(synonyms)
This is all the clue.
(Other definitions for agnostic that I've seen before include "Religious sceptic" , "Doubtful, non-committal" , "He doesn't believe" , "Doubting, non-commital" , "Song I act (anag)" .)
'doubter' is the definition.
(synonyms)
This is all the clue.
(Other definitions for sceptic that I've seen before include "He's hard to convince" , "Thomas for one" , "A doubting Thomas" , "I may doubt that" , "One doesn't believe" .)