Can black win in this Go situation?
That is a good try for Black, because it is a "net" play. But it doesn't quite work.

White descends, one spot right of the "marked stone. Black "fills" below. White cuts to the southeast, atariing two Black stones, Black escapes. White cuts again south of the marked stone, atariing one Black stone, Black escapes.

White's next move to the left is an atari on the marked stone, and the following move connects to the White stones to the left, while trapping five Black stones.