Chris Turner's visitors were then reduced to 10 men after Daniel Nardiello was given his marching orders for a late lunge on goalkeeper Alex Smithies but the Terriers failed to capitalise.
Clark said: "It's disappointing because we created some unbelievable chances for a natural goalscorer to put the ball in the back of the net.
"I think the quality from both the new boys (Lionel Ainsworth and Anthony Pilkington) in each half was very good.
"It's disappointing when you create that amount of chances not to win. We shot ourselves in the foot - we feel it's two points dropped."