___ Enterprise (3)
(Another definition for uss that I've seen is " United States Ship (abbr.)".)
'enterprise' is the definition.
(I've seen this before)
This is all the clue.
(Other definitions for venture that I've seen before include "Risky commercial undertaking" , "Enterprise involving risk" , "Dare to put forward" , "The undertaking involves uncertainty" , "Course of action involving danger or uncertainty" .)