Jeff Hendrick put the Rams in front in the 23rd minute and Jamie Ward extended the visitors' lead from the penalty spot three minutes after the break.
But Michail Antonio pulled a goal back in the 51st minute following a goalmouth scramble and six minutes later Miguel Llera equalised.
Clough said: "We were pleased to get a point away from home and to score another two goals on the back of the three last week.
"I was happy with the performance and certainly with the way we played in the first half.
"I'm disappointed that the referee maybe missed a couple of fouls in the build-up to both their goals.
"The first goal was as good a team goal as you'll see today. It started in our own half with the midfielders involved and the ball going to the striker's feet, with lots of movement off the ball and a lovely finish as well.
"I don't think there were too many arguments about the penalty. I didn't see one player or even a member of their staff arguing with that one.
"It was lovely to get a two-goal lead but, the young side we are, we've got to learn to look after it for five or 10 minutes.
"You don't necessarily have to do much - you just have to stop them getting back in the game. It's a learning process.
"We had to change our centre-half 15 minutes before kick-off and Jake Buxton's had three training sessions in nine weeks so he showed incredible character to play like he did."