Clarke was unhappy that the referee gave FCL a penalty after Craig Palmer went down in the box when Town were still leading 4-0.
"The referee is disgraceful," Clarke said. "How can he not see that the boy (Palmer) clearly threw himself to the ground?"
He also had complaints about FCL's second penalty which led to keeper Marco Schuipers being sent off after he hauled down Craig Cinoli, saying it was "harsh."
"It's not Marco's fault, Shane (Macdonald) should have stayed with him. But in the end, the sending off was a bit harsh on the lad."