Clarke was left to bemoan his side's poor opening 45 minutes which contributed to extending their run to one point from a possible 15.
"If you go 2-0 down in the Premier League it is difficult to get a result," he said.
"We had a go in the second half but the key moment was the penalty on half-time - if we'd come in 1-0 down we would have had more chance of getting something from the game.
"I don't think we were great tonight but I don't think Everton were particularly great either, it was a nothing game.
"We were quite comfortable until we gave away a bad goal but even after that I thought we were in a decent place and the penalty on half-time made it much more difficult."