Company in the money (4)
I believe the answer is:
coin
'the money' is the definition.
(coin is a type of money)
'company in' is the wordplay.
'company' becomes 'co' (abbreviation).
'co'+'in'='COIN'
(Other definitions for coin that I've seen before include "Invent (a new phrase)" , "Fabricate" , "Metallic money" , "Make up" , "stamp" .)