Doubter comes out of this fancy nicknamed joint (5)
I believe the answer is:
cynic
'doubter' is the definition.
(I've seen this before)
'comes out of this fancy nicknamed joint' is the wordplay.
'comes out of this' says the answer is hidden in the clue.
'CYNIC' is hidden within 'fancy nicknamed joint'.
(Other definitions for cynic that I've seen before include "Misanthrope" , "One dismissive of human motives" , "Sceptic; philosopher" , "Person who sneers at others, a sceptic" , "One who scoffs" .)