Nothing works? Oh dear, I just miscalculated (4)
I believe the answer is:
oops
'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!" .)