Ready for the press, businessman's banking foundation (7)
I believe the answer is:
subedit
'ready for the press' is the definition.
'businessman's banking foundation' is the wordplay.
'businessman' becomes 'suit'.
'banking' indicates putting letters inside.
'foundation' becomes 'bed' (bed is a kind of foundation).
'suit' going around 'bed' is 'SUBEDIT'.
(Other definitions for subedit that I've seen before include "Correct copy" , "Copyread" , "Check newspaper copy" , "to work on newspaper" , "Work on paper" .)