The wrong thing to be found in (5)

I believe the answer is:

error

I'm a little stuck... Click here to teach me more about this clue!

'the wrong' is the definition.
(I've seen this before)

I don't understand the rest of the clue.

(Other definitions for error that I've seen before include "Boob" , "Mistake or fault" , "Blunder, slip" , "Bug" , "Mistake, lapse" .)

I've seen this clue in the Evening Standard.

Want a hint initially instead of a full solution? Install my app