Trick sure to go wrong? (4)
I believe the answer is:
ruse
'trick' is the definition.
(I've seen this before)
'sure to go wrong?' is the wordplay.
'to go wrong?' indicates an anagram (I've seen 'go wrong' mean this).
'sure' with letters rearranged gives 'RUSE'.
(Other definitions for ruse that I've seen before include "Ploy, artifice" , "Sue to be a ploy" , "Sure to be a trick" , "Plan intended to deceive" , "Deceptive manoeuvre" .)