Solomon perhaps a Mafia man? (4,3)
I believe the answer is:
wise guy
'solomon' is the definition.
Both the definition and answer are singular nouns.
Maybe there's an association between them I don't understand?
'a mafia man?' is the wordplay.
'a mafia' becomes 'wise' (I can't explain this - if you can you should believe this answer much more).
'man?' becomes 'guy' (guy is a kind of man).
'wise'+'guy'='WISE GUY'
'perhaps' is the link.
Can you help me to learn more?
(Other definitions for wise guy that I've seen before include "Smart alec (US)" , "smart Aleck" .)