Come to nothing (4,7)
'come to nothing' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for go up in smoke that I've seen before include "Be destroyed by fire" , "vanish" , "Arsonist's deed may" , "be wasted" , "Come to nothing (like a cigarette?)" .)
'come to nothing' is the definition.
(thesaurus)
This is all the clue.
(Another definition for fall through that I've seen is " Don't succeed (when crossing thin ice?)".)