Edit photo to show vacuous chancer at work? Not possible (4,3)

'edit photo to' is the definition.
I can't judge whether this defines the answer.

'vacuous chancer at work? not possible' is the wordplay.
'vacuous' says to hollow out the word (remove centre letters).
'at' is a charade indicator (letters next to each other).
'work?' becomes 'op' (abbreviation for opus).
'not possible' becomes 'out' (I can't explain this - if you can you should give a lot more credence to this answer).
'chancer' with its middle taken out is 'cr'.
'cr'+'op'+'out'='CROP OUT'

'show' acts as a link.

Can you help me to learn more?