Fancy Nicholas embracing a doubting Thomas (5)
I believe the answer is:
cynic
'a doubting thomas' is the definition.
(I've seen this in another clue)
'fancy nicholas embracing' is the wordplay.
'embracing' indicates a hidden word (the solution is embraced by words in the clue).
'CYNIC' is hidden in the letters of 'fancy nicholas'.
(Other definitions for cynic that I've seen before include "Person who sneers at others, a sceptic" , "One who believes people's motives are always selfish" , "One dismissive of human motives" , "Doubter of others' motives" , "Sceptic; philosopher" .)