United extended their unbeaten run in all competitions to six games but it could have been so much better had Aidy White or Jose Baxter found the net instead of hitting the woodwork.
"I'm absolutely delighted, that's the best we've seen in the last couple of months," said Clough.
"We controlled the game from start to finish. The only thing lacking was a goal, the hardest thing to do. We got the ball down and we played it. From the first few minutes we played well.
"When you come here you've got to make sure Stevenage don't get any encouragement. It's a difficult place to come.
"We hit the woodwork twice, we had numerous other opportunities here, controlled the game in all areas, the attitude was spot on and the performance was complete apart from the goal.
"Aidy's had a great shot, I think the keeper flapped at it and got a little touch, and it came back of the post.
"Jose [Baxter] had a great chance too. Sometimes we bemoan a bit of quality, but there's a bit of luck needed too. We're talking about an inch and we would have won the game. The intent was there to win the game."