Crossword Genius

Nothing works? Oh dear, I just miscalculated (4)

Ross

I believe the answer is:

oops

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

'oh dear i just miscalculated' is the definition.
I can't tell whether this definition defines the answer.

'nothing works?' is the wordplay.
'nothing' becomes 'o' (looks like zero - 0).
'works?' becomes 'ops' (I've seen this in other clues).
'o'+'ops'='OOPS'

Can you help me to learn more?

(Other definitions for oops that I've seen before include "Oh dear, I've spilt something!" , "I'm sorry" , "Oh dear, that was careless!" , "Harem" , "Clumsy me!" .)

I've seen this clue in the Independent.
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