Doubting Thomas (7)
'doubting thomas' is the definition.
(synonyms)
This is all the clue.
(Other definitions for sceptic that I've seen before include "He's hard to convince" , "One who doubts accepted opinions" , "One is inclined to doubt accepted opinions" , "Greek philosopher" , "One questioning accepted opinions" .)
'doubting thomas' is the definition.
(synonyms)
This is all the clue.