Still in the venture (4)
I believe the answer is:
even
'still' is the definition.
(I know that still can be written as even)
'in the venture' is the wordplay.
'in' indicates a hidden word.
'EVEN' is hidden within 'the venture'.
(Other definitions for even that I've seen before include "Flattened" , "Crisp and ---, how King Wenceslas found the snow" , "draw" , "of consistent quality" , "Iron - uniform - flat" .)