Still in the venture (4)
I believe the answer is:
even
'still' is the definition.
(synonyms)
'in the venture' is the wordplay.
'in' says the answer is hidden in the clue.
'EVEN' can be found hidden inside '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" .)