Charlie’s new salary reduced pressure over work (10)
I believe the answer is:
'charlie's' is the definition.
Both the answer and definition are singular nouns.
Perhaps there's an association between them I don't understand?
'new salary reduced pressure over work' is the wordplay.
'new salary' becomes 'nincom' (I am not sure about this - if you are sure you should give a lot more credence to this answer).
'reduced pressure' becomes 'p' (abbreviation; 'reduced' suggests an abbreviation).
'over' becomes 'o' (cricket abbreviation).
'work' becomes 'op' (common abbreviation for 'opus').
Can you help me to learn more?
(Other definitions for nincompoop that I've seen before include "jerk" , "dunce" , "Wally" , "Stupid person" , "Foolish person" .)