Device sure to go wrong? (4)
I believe the answer is:
ruse
'device' is the definition.
(I have seen 'Deceptive device ' mean 'ruse' so perhaps 'device' could also mean 'ruse')
'sure to go wrong?' is the wordplay.
'to go wrong?' indicates anagramming the letters (I've seen 'go wrong' mean this).
'sure' anagrammed gives 'RUSE'.
(Other definitions for ruse that I've seen before include "Clever stratagem or plan" , "Ploy, artifice" , "Trick designed to deceive" , "Artful ploy" , "Trick, stratagem" .)