Flush from corporate venture (4)
I believe the answer is:
even
'flush' is the definition.
('even' can be similar in meaning to 'flush')
'from corporate venture' is the wordplay.
'from' says the answer is hidden in the clue.
'EVEN' can be found hidden inside 'corporate venture'.
(Other definitions for even that I've seen before include "Not bumpy" , "draw" , "50-50" , "happening to take time off?" , "end of the day, reading poetry" .)