Crossword Genius

Make a mistake losing top address in Munich (3)

Ross

I believe the answer is:

err

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

'make a mistake' is the definition.
(I've seen this before)

I don't understand how the rest of the clue works.

Can you help me to learn more?

(Other definitions for err that I've seen before include "Drop a clanger" , "Blunder" , "Boob" , "Slip up" , "Make a wrong move" .)

I've seen this clue in the Irish Times and the Irish Times (Crosaire).
Want a hint initially instead of a full solution? Install my app