Anybody in the money (3)
I believe the answer is:
one
'anybody' is the definition.
Both the answer and definition are singular nouns.
Perhaps there's an association between them I don't understand?
'in the money' is the wordplay.
'in' says the answer is hidden in the clue.
'ONE' is hidden within 'money'.
Can you help me to learn more?
(Other definitions for one that I've seen before include "Hour after midnight" , "Single, sole" , "both halves" , "Single and undivided" , "I can mean this" .)